Unit List
Unit Option:
View list
Ontology ID Name Parent Description Action
UO_0000000 unit "A unit of measurement is a standardized quantity of a physical quality." [Wikipedia:Wikipedia]
UO_0000001 length unit UO_0000000 "A unit which is a standard measure of the distance between two points." [Wikipedia:Wikipedia]
UO_0000002 mass unit UO_0000000 "A unit which is a standard measure of the amount of matter/energy of a physical object." [Wikipedia:Wikipedia]
UO_0000003 time unit UO_0000000 "A unit which is a standard measure of the dimension in which events occur in sequence." [Wikipedia:Wikipedia]
UO_0000004 electric current unit UO_0000000 "A unit which is a standard measure of the flow of electric charge." [Wikipedia:Wikipedia]
UO_0000005 temperature unit UO_0000000 "A unit which is a standard measure of the average kinetic energy of the particles in a sample of matter." [Wikipedia:Wikipedia]
UO_0000006 substance unit UO_0000000 "A unit which is a standardised quantity of an element or compound with uniform composition." [Wikipedia:Wikipedia]
UO_0000007 luminous intensity unit UO_0000157 "A unit which is a standard measure of the wavelength-weighted power emitted by a light source in a particular direction." [Wikipedia:Wikipedia]
UO_0000008 meter UO_0000001 "A length unit which is equal to the length of the path traveled by light in vacuum during a time interval of 1/299 792 458 of a second." [BIPM:BIPM, NIST:NIST]
UO_0000009 kilogram UO_1000021 "A mass unit which is equal to the mass of the International Prototype Kilogram kept by the BIPM at Svres, France." [BIPM:BIPM, NIST:NIST]
UO_0000010 second UO_0000003 "A time unit which is equal to the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom." [BIPM:BIPM, NIST:NIST]
UO_0000011 ampere UO_1000011 "An electric current unit which is equal to the constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 m apart in vacuum, would produce between these conductors a force equal to 2 x 10^[-7] newton per meter of length." [BIPM:BIPM, NIST:NIST]
UO_0000012 kelvin UO_1000012 "A thermodynamic temperature unit which is equal to the fraction 1/273.16 of the thermodynamic temperature of the triple point of water." [BIPM:BIPM, NIST:NIST]
UO_0000013 mole UO_0000006 "A substance unit which is equal to the amount of substance of a molecular system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12." [BIPM:BIPM, NIST:NIST]
UO_0000014 candela UO_0000007 "A luminous intensity unit which equal to the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian." [BIPM:BIPM, NIST:NIST]
UO_0000015 centimeter UO_0000001 "A length unit which is equal to one hundredth of a meter or 10^[-2] m." [NIST:NIST]
UO_0000016 millimeter UO_0000001 "A length unit which is equal to one thousandth of a meter or 10^[-3] m." [NIST:NIST]
UO_0000017 micrometer UO_0000001 "A length unit which is equal to one millionth of a meter or 10^[-6] m." [NIST:NIST]
UO_0000018 nanometer UO_0000001 "A length unit which is equal to one thousandth of one millionth of a meter or 10^[-9] m." [NIST:NIST]
UO_0000019 angstrom UO_1000019 "A length unit which is equal to 10 [-10] m." [NIST:NIST]
UO_0000020 picometer UO_0000001 "A length unit which is equal to 10^[-12] m." [NIST:NIST]
UO_0000021 gram UO_1000021 "A mass unit which is equal to one thousandth of a kilogram or 10^[-3] kg." [NIST:NIST]
UO_0000022 milligram UO_1000021 "A mass unit which is equal to one thousandth of a gram or 10^[-3] g." [UOC:GVG]
UO_0000023 microgram UO_1000021 "A mass unit which is equal to one millionth of a gram or 10^[-6] g." [UOC:GVG]
UO_0000024 nanogram UO_1000021 "A mass unit which is equal to one thousandth of one millionth of a gram or 10^[-9] g." [UOC:GVG]
UO_0000025 picogram UO_1000021 "A mass unit which is equal to 10^[-12] g." [UOC:GVG]
UO_0000026 femtogram UO_1000021 "A mass unit which is equal to 10^[-15] g." [NIST:NIST]
UO_0000027 degree Celsius UO_1000027 "A temperature unit which is equal to one kelvin degree. However, they have their zeros at different points. The centigrade scale has its zero at 273.15 K." [NIST:NIST]
UO_0000028 millisecond UO_0000003 "A time unit which is equal to one thousandth of a second or 10^[-3] s." [NIST:NIST]
UO_0000029 microsecond UO_0000003 "A time unit which is equal to one millionth of a second or 10^[-6] s." [NIST:NIST]
UO_0000030 picosecond UO_0000003 "A time unit which is equal to 10^[-12] s." [NIST:NIST]
UO_0000031 minute UO_0000003 "A time unit which is equal to 60 seconds." [Wikipedia:Wikipedia]
UO_0000032 hour UO_0000003 "A time unit which is equal to 3600 seconds or 60 minutes." [Wikipedia:Wikipedia]
UO_0000033 day UO_0000003 "A time unit which is equal to 24 hours." [Wikipedia:Wikipedia]
UO_0000034 week UO_0000003 "A time unit which is equal to 7 days." [Wikipedia:Wikipedia]
UO_0000035 month UO_0000003 "A time unit which is approximately equal to the length of time of one of cycle of the moon's phases which in science is taken to be equal to 30 days." [Wikipedia:Wikipedia]
UO_0000036 year UO_0000003 "A time unit which is equal to 12 months which in science is taken to be equal to 365.25 days." [Wikipedia:Wikipedia]
UO_0000037 milliampere UO_1000011 "An electric current unit current which is equal to one thousandth of an ampere or 10^[-3] A." [UOC:GVG]
UO_0000038 microampere UO_1000011 "An electric current unit current which is equal to one millionth of an ampere or 10^[-6] A." [UOC:GVG]
UO_0000039 micromole UO_0000006 "A substance unit equal to a millionth of a mol or 10^[-6] mol." [NIST:NIST]
UO_0000040 millimole UO_0000006 "A substance unit equal to a thousandth of a mol or 10^[-3] mol." [NIST:NIST]
UO_0000041 nanomole UO_0000006 "A substance unit equal to one thousandth of one millionth of a mole or 10^[-9] mol." [NIST:NIST]
UO_0000042 picomole UO_0000006 "A substance unit equal to 10^[-12] mol." [NIST:NIST]
UO_0000043 femtomole UO_0000006 "A substance unit equal to 10^[-15] mol." [NIST:NIST]
UO_0000044 attomole UO_0000006 "A substance unit equal to 10^[-18] mol." [NIST:NIST]
UO_0000045 base unit UO_0000000 "A unit which is one of a particular measure to which all measures of that type can be related." [NIST:NIST]
UO_0000046 prefix
UO_0000047 area unit UO_0000000 "A unit which is a standard measure of the amount of a 2-dimensional flat surface." [UOC:GVG]
UO_0000048 acceleration unit UO_0000000 "A unit which is a standard measure of the rate of change of velocity in either speed or direction." [Wikipedia:Wikipedia]
UO_0000049 angular velocity unit UO_0000000 "A unit which is a standard measure of the rate of angular movement about an axis;the angle rotated in a given time." [Wikipedia:Wikipedia]
UO_0000050 angular acceleration unit UO_0000000 "A unit which is a standard measure of the rate of change of angular velocity." [Wikipedia:Wikipedia]
UO_0000051 concentration unit UO_0000000 "A unit which represents a standard measurement of how much of a given substance there is mixed with another substance." [UOC:GVG]
UO_0000052 mass density unit UO_0000182 "A density unit which is a standard measure of the mass of a substance in a given volume." [UOC:GVG]
UO_0000053 luminance unit UO_0000157 "A unit which is a standard measure of the luminous intensity impinging on a given area." [Wikipedia:Wikipedia]
UO_0000054 area density unit UO_0000182 "A density unit which is a standard measure of the mass exerting an influence on a given area." [Wikipedia:Wikipedia]
UO_0000055 molar mass unit UO_0000002 "A unit which is a standard measure of the mass of a homogeneous substance containing 6.02 x 1023 atoms or molecules." [Wikipedia:Wikipedia]
UO_0000056 molar volume unit UO_0000095 "A unit which is a standard measure of the volume of a homogeneous substance containing 6.02 x 1023 atoms or molecules." [Wikipedia:Wikipedia]
UO_0000057 momentum unit UO_0000000 "A unit which is a standard measure of the quantity of motion measured by the product of mass and velocity." [Wikipedia:Wikipedia]
UO_0000058 rotational frequency unit UO_0000105 "A unit which is a standard measure of the number of rotations in a given time." [NIST:NIST]
UO_0000059 specific volume unit UO_0000095 "A unit which is a standard measure of the volume of a given mass of substance (the reciprocal of density)." [Wikipedia:Wikipedia]
UO_0000060 speed/velocity unit UO_0000000 "A unit which is a standard measure of the rate of movement. Speed is measured in the same physical units of measurement as velocity, but does not contain the element of direction that velocity has. Speed is thus the magnitude component of velocity." [Wikipedia:Wikipedia]
UO_0000061 unit of molarity UO_0000051 "A concentration unit which is a standard measure of the number of moles of a given substance per liter of solution." [UOC:GVG]
UO_0000062 molar UO_1000062 "A unit of concentration which expresses a concentration of 1 mole of solute per liter of solution (mol/L)." [UOC:GVG]
UO_0000063 millimolar UO_1000062 "A unit of molarity which is equal to one thousandth of a molar or 10^[-3] M." [UOC:GVG]
UO_0000064 micromolar UO_1000062 "A unit of molarity which is equal to one millionth of a molar or 10^[-6] M." [UOC:GVG]
UO_0000065 nanomolar UO_1000062 "A unit of molarity which is equal to one thousandth of one millionth of a molar or 10^[-9] M." [UOC:GVG]
UO_0000066 picomolar UO_1000062 "A unit of molarity which is equal to 10^[-12] M." [UOC:GVG]
UO_0000067 unit of molality UO_0000051 "A concentration unit which is a standard measure of the number of moles of a given substance per kilogram of solvent." [UOC:GVG]
UO_0000068 molal UO_0000067 "A unit of concentration which expresses a concentration of a solution of 1 mole per kilogram of solvent (mol/kg)." [UOC:GVG]
UO_0000069 millimolal UO_0000067 "A molality unit which is equal to one thousandth of a molal or 10^[-3] m." [UOC:GVG]
UO_0000070 micromolal UO_0000067 "A molality unit which is equal to one millionth of a molal or 10^[-6] m." [UOC:GVG]
UO_0000071 nanomolal UO_0000067 "A molality unit which is equal to one thousandth of one millionth of a molal or 10^[-9] m." [UOC:GVG]
UO_0000072 picomolal UO_0000067 "A molality unit which is equal to 10^[-12] m." [UOC:GVG]
UO_0000073 femtomolar UO_1000062 "A unit of molarity which is equal to 10^[-15] M." [UOC:GVG]
UO_0000074 unit of normality UO_0000051 "A unit of concentration which highlights the chemical nature of salts." [Wikipedia:Wikipedia]
UO_0000075 normal UO_0000074 "A unit of concentration which is one gram equivalent of a solute per liter of solution. A gram equivalent weight or equivalent is a measure of the reactive capacity of a given molecule." [Wikipedia:Wikipedia]
UO_0000076 mole fraction UO_0000191 "A concentration unit which denotes the number of moles of solute as a proportion of the total number of moles in a solution." [Wikipedia:Wikipedia]
UO_0000077 meter per second per second UO_0000048 "An acceleration unit which is equal to the acceleration an object changing its velocity by 1meter/s over a time period that equals one second." [NIST:NIST]
UO_0000078 radian per second per second UO_1000078 "An angular unit acceleration which is equal to the angular acceleration of an object changing its angular velocity by 1rad/s over a time period that equals one second." [NIST:NIST]
UO_0000079 radian per second UO_0000049 "An angular unit velocity which is equal to about 9.54930 rpm (revolutions per minute)." [NIST:NIST]
UO_0000080 square meter UO_1000080 "An area unit which is equal to an area enclosed by a square with sides each 1 meter long." [NIST:NIST]
UO_0000081 square centimeter UO_1000081 "An area unit which is equal to one ten thousandth of a square meter or 10^[-4] m^[2]." [NIST:NIST]
UO_0000082 square millimeter UO_1000082 "An area unit which is equal to one millionth of a square meter or 10^[-6] m^[2]." [NIST:NIST]
UO_0000083 kilogram per cubic meter UO_0000052 "A mass unit density which is equal to mass of an object in kilograms divided by the volume in cubic meters." [UOC:GVG]
UO_0000084 gram per cubic centimeter UO_1000084 "A mass unit density which is equal to mass of an object in grams divided by the volume in cubic centimeters." [UOC:GVG]
UO_0000085 candela per square meter UO_1000085 "A luminance unit which is equal to a luminous intensity of one candela radiating from a surface whose area is one square meter." [NIST:NIST]
UO_0000086 kilogram per square meter UO_0000054 "An area density unit which is equal to the mass of an object in kilograms divided by the surface area in meters squared." [NIST:NIST]
UO_0000087 kilogram per mole UO_1000088 "A molar mass unit which is equal to one kilogram of mass of one mole of chemical element or chemical compound." [NIST:NIST]
UO_0000088 gram per mole UO_1000088 "A molar mass unit which is equal to one gram of mass of one mole of chemical element or chemical compound." [NIST:NIST]
UO_0000089 cubic meter per mole UO_0000056 "A molar volume unit which is equal to 1 cubic meter occupied by one mole of a substance in the form of a solid, liquid, or gas." [NIST:NIST]
UO_0000090 cubic centimeter per mole UO_1000090 "A molar volume unit which is equal to 1 cubic centimeter occupied by one mole of a substance in the form of a solid, liquid, or gas." [NIST:NIST]
UO_0000091 kilogram meter per second UO_0000057 "A momentum unit which is equal to the momentum of a one kilogram mass object with a speed of one meter per second." [NIST:NIST]
UO_0000092 turns per second UO_0000058 "A rotational frequency unit which is equal to the number complete turn in a period of time that equals to 1 second." [NIST:NIST]
UO_0000093 cubic meter per kilogram UO_0000059 "A specific volume unit which is equal to one cubic meter volume occupied by one kilogram of a particular substance." [NIST:NIST]
UO_0000094 meter per second UO_1000094 "A speed/velocity unit which is equal to the speed of an object traveling 1 meter distance in one second." [NIST:NIST]
UO_0000095 volume unit UO_0000000 "A unit which is a standard measure of the amount of space occupied by any substance, whether solid, liquid, or gas." [NIST:NIST]
UO_0000096 cubic meter UO_0000095 "A volume unit which is equal to the volume of a cube with edges one meter in length. One cubic meter equals to 1000 liters." [NIST:NIST]
UO_0000097 cubic centimeter UO_1000097 "A volume unit which is equal to one millionth of a cubic meter or 10^[-9] m^[3], or to 1 ml." [NIST:NIST]
UO_0000098 milliliter UO_1000099 "A volume unit which is equal to one thousandth of a liter or 10^[-3] L, or to 1 cubic centimeter." [NIST:NIST]
UO_0000099 liter UO_1000099 "A volume unit which is equal to one thousandth of a cubic meter or 10^[-3] m^[3], or to 1 decimeter." [NIST:NIST]
UO_0000100 cubic decimeter UO_0000095 "A volume unit which is equal to one thousand of a cubic meter or 10^[-3] m^[3], or to 1 L." [NIST:NIST]
UO_0000101 microliter UO_1000099 "A volume unit which is equal to one millionth of a liter or 10^[-6] L." [NIST:NIST]
UO_0000102 nanoliter UO_1000099 "A volume unit which is equal to one thousandth of one millionth of a liter or 10^[-9] L." [NIST:NIST]
UO_0000103 picoliter UO_1000099 "A volume unit which is equal to 10^[-12] L." [NIST:NIST]
UO_0000104 femtoliter UO_1000099 "A volume unit which is equal to 10^[-15] L." [NIST:NIST]
UO_0000105 frequency unit UO_0000000 "A unit which is a standard measure of the number of repetitive actions in a particular time." [NIST:NIST]
UO_0000106 hertz UO_1000106 "A frequency unit which is equal to 1 complete cycle of a recurring phenomenon in 1 second." [NIST:NIST]
UO_0000107 force unit UO_0000000 "A unit which is a standard measure of the force is applied when a mass is accelerated." [NIST:NIST]
UO_0000108 newton UO_0000107 "A force unit which is equal to the force required to cause an acceleration of 1m/s2 of a mass of 1 Kg in the direction of the force." [NIST:NIST]
UO_0000109 pressure unit UO_0000000 "A unit which is a standard measure of the force applied to a given area." [NIST:NIST]
UO_0000110 pascal UO_0000109 "A pressure unit which is equal to the pressure or stress on a surface caused by a force of 1 newton spread over a surface of 1 m^[2]." [NIST:NIST]
UO_0000111 energy unit UO_0000000 "A unit which is a standard measure of the work done by a certain force (gravitational, electric, magnetic, force of inertia, etc)." [NIST:NIST]
UO_0000112 joule UO_0000111 "An energy unit which is equal to the energy required when a force of 1 newton moves an object 1 meter in the direction of the force." [NIST:NIST]
UO_0000113 power unit UO_0000000 "A unit which is a standard measure power or the rate of doing work." [NIST:NIST]
UO_0000114 watt UO_1000114 "A power unit which is equal to the power used when work is done at the rate of 1 joule per second." [NIST:NIST]
UO_0000115 illuminance unit UO_0000157 "A unit which is a standard measure of the luminous flux incident on a unit area." [Wikipedia:Wikipedia]
UO_0000116 lux UO_1000116 "An illuminance unit which is equal to the illuminance produced by 1 lumen evenly spread over an area 1 m^[2]." [NIST:NIST]
UO_0000117 luminous flux unit UO_0000157 "A unit which is a standard measure of the flow of radiant energy." [Wikipedia:Wikipedia]
UO_0000118 lumen UO_0000117 "A luminous flux unit which is equal to the luminous flux emitted into 1 steradian by a point source of 1 candela." [NIST:NIST]
UO_0000119 catalytic activity unit UO_0000000 "A unit which is a standard measure of the amount of the action of a catalyst." [NIST:NIST]
UO_0000120 katal UO_1000120 "A catalytic unit activity which is equal to the activity of a catalyst in moles per second, such as the amount of an enzyme needed to transform one mole of substrate per second." [NIST:NIST]
UO_0000121 angle unit UO_0000000 "A unit which is a standard measure of the figure or space formed by the junction of two lines or planes." [Wikipedia:Wikipedia]
UO_0000122 plane angle unit UO_0000121 "A unit which is a standard measure of the angle formed by two straight lines in the same plane." [Wikipedia:Wikipedia]
UO_0000123 radian UO_0000122 "A plane angle unit which is equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle, approximately 57 degrees 17 minutes and 44.6 seconds." [NIST:NIST]
UO_0000124 solid angle unit UO_0000121 "A unit which is a standard measure of the angle formed by three or more planes intersecting at a common point." [Wikipedia:Wikipedia]
UO_0000125 steradian UO_1000125 "A solid angle unit which is equal to the solid angle subtended at the center of a sphere by an area on the surface of the sphere that is equal to the radius squared." [NIST:NIST]
UO_0000127 radiation unit UO_0000000 "A unit which is a standard measure of the amount of radiation emitted by a given radiation source as well as the amount of radiation absorbed or deposited in a specific material by a radiation source." [OCRBS:OCRBS]
UO_0000128 activity (of a radionuclide) unit UO_0000127 "A unit which is a standard measure of the transformation (disintegration) rate of a radioactive substance." [DEFRA:DEFRA]
UO_0000129 absorbed dose unit UO_0000127 "A unit which is a standard measure of the energy imparted by ionizing radiation to unit mass of matter such as tissue." [DEFRA:DEFRA]
UO_0000130 dose equivalent unit UO_0000127 "A unit which is a standard measure of the expression of dose in terms of its biological effect." [ORCBS:ORCBS]
UO_0000131 exposure unit UO_0000127 "A unit which is a standard measure of the quantity that expresses the ability of radiation to ionize air and thereby create electric charges which can be collected and measured." [ORCBS:ORCBS]
UO_0000132 becquerel UO_1000132 "An activity (of a radionuclide) unit which is equal to the activity of a quantity of radioactive material in which one nucleus decays per second or there is one atom disintegration per second (dps)." [NIST:NIST]
UO_0000133 curie UO_1000133 "An activity (of a radionuclide) unit which is equal to the activity of a quantity of radioactive material in which there are 3.7 x 10^[10] atom disintegration per second (dps)." [ORCBS:ORCBS]
UO_0000134 gray UO_1000134 "An absorbed dose unit which is equal to the absorption of one joule of radiation energy by one kilogram of matter." [NIST:NIST]
UO_0000135 rad UO_1000135 "An absorbed dose unit which is equal to 0.01 gray (Gy)." [Wikipedia:Wikipedia]
UO_0000136 roentgen UO_0000131 "An exposure unit which is equal to the amount of radiation required to liberate positive and negative charges of one electrostatic unit of charge in 1 cm^[3] of air at standard temperature and pressure (STP). This corresponds to the generation of approximately 2.0810^[9] ion pairs." [Wikipedia:Wikipedia]
UO_0000137 sievert UO_1000137 "A dose equivalent unit which is equal to the absorption of one joule of radiation energy by one kilogram of matter." [NIST:NIST]
UO_0000138 millisievert UO_1000137 "A dose equivalent unit which is equal to one thousandth of a sievert or 10^[-3] Sv." [NIST:NIST]
UO_0000139 microsievert UO_1000137 "A dose equivalent unit which is equal to one millionth of a sievert or 10^[-6] Sv." [NIST:NIST]
UO_0000140 Roentgen equivalent man UO_0000130 "A dose equivalent unit which when multiplied by hundred is equal to one sievert or 1 Sv. 1 Sv is equal to 100 rem." [Wikipedia:Wikipedia]
UO_0000141 microgray UO_1000134 "An absorbed dose unit which is equal to one millionth of a gray or 10^[-6] Gy." [NIST:NIST]
UO_0000142 milligray UO_1000134 "An absorbed dose unit which is equal to one thousandth of a gray or 10^[-3] Gy." [NIST:NIST]
UO_0000143 nanogray UO_1000134 "An absorbed dose unit which is equal to one thousandth of a millionth of a gray or 10^[-9] Gy." [NIST:NIST]
UO_0000144 nanosievert UO_1000137 "A dose equivalent unit which is equal to one thousandth of a millionth of a sievert or 10^[-9] Sv." [NIST:NIST]
UO_0000145 millicurie UO_1000133 "An activity (of a radionuclide) unit which is equal to one thousandth of a curie or 10^[-3] Ci." [ORCBS:ORCBS]
UO_0000146 microcurie UO_1000133 "An activity (of a radionuclide) unit which is equal to one millionth of a curie or 10^[-6] Ci." [ORCBS:ORCBS]
UO_0000147 disintegrations per minute UO_1000147 "An activity (of a radionuclide) unit which is equal to the activity of a quantity of radioactive material in which one nucleus decays per minute or there is one atom disintegration per minute." [ORCBS:ORCBS]
UO_0000148 counts per minute UO_1000148 "An activity (of a radionuclide) unit which is equal to the number of light emissions produced by ionizing radiation in one minute." [ORCBS:ORCBS]
UO_0000150 nanosecond UO_0000003 "A time unit which is equal to one thousandth of one millionth of a second or 10^[-9] s." [NIST:NIST]
UO_0000151 century UO_0000003 "A time unit which is equal to 100 years." [Wikipedia:Wikipedia]
UO_0000152 half life UO_0000003 "A time unit which represents the period over which the activity or concentration of a specified chemical or element falls to half its original activity or concentration." [MGED:MGED]
UO_0000153 foot candle UO_1000153 "An illuminance unit which is equal to the illuminance produced by 1 lumen evenly spread over an area 1 foot^[2]. One footcandle is equal to 10.76 lux." [Wikipedia:Wikipedia]
UO_0000154 irradiance unit UO_0000157 "A unit which is a standard measure of the power of electromagnetic radiation at a surface, per unit area." [Wikipedia:Wikipedia]
UO_0000155 watt per square meter UO_0000154 "An irradiance unit which is equal to 1 watt of radiant power incident per one square meter surface area." [NIST:NIST]
UO_0000156 einstein per square meter per second UO_0000154 "An irradiance unit which is equal to one einstein per square meter per second. One einstein is one mole of photons, regardless of their frequency. Therefore, the number of photons in an einstein is Avogadro's number." [Wikipedia:Wikipedia]
UO_0000157 light unit UO_0000000 "A unit which is a standard measure of the intensity of light." [NIST:NIST]
UO_0000158 watt per steradian per square meter UO_0000161 "A radiance unit which is equal to one watt of radiant power incident per steradian solid angle per one square meter projected area of the source, as viewed from the given direction." [NIST:NIST]
UO_0000159 radiant intensity unit UO_0000157 "A unit which is a standard measure of the intensity of electromagnetic radiation." [Wikipedia:Wikipedia]
UO_0000160 microeinstein per square meter per second UO_0000154 "An irradiance unit which is equal to one microeinstein per square meter per second or 10^[-6] microeinstein/sm^[2]." [Wikipedia:Wikipedia]
UO_0000161 radiance unit UO_0000157 "A unit which is a standard measure of the power of electromagnetic radiation through space or through a material medium in the form of electromagnetic waves." [Wikipedia:Wikipedia]
UO_0000162 watt per steradian UO_0000159 "A radiant intensity unit which is equal to one kilogram meter squared per second cubed per steradian." [NIST:NIST]
UO_0000163 mass percentage UO_1000163 "A dimensionless concentration unit which denotes the mass of a substance in a mixture as a percentage of the mass of the entire mixture." [Wikipedia:Wikipedia]
UO_0000164 mass volume percentage UO_1000164 "A dimensionless concentration unit which denotes the mass of the substance in a mixture as a percentage of the volume of the entire mixture." [UOC:GVG]
UO_0000165 volume percentage UO_0000205 "A dimensionless concentration unit which denotes the volume of the solute in mL per 100 mL of the resulting solution." [UOC:GVG]
UO_0000166 parts per notation unit UO_0000186 "A dimensionless concentration notation which describes the amount of one substance in another. It is the ratio of the amount of the substance of interest to the amount of that substance plus the amount of the substance." [Wikipedia:Wikipedia]
UO_0000167 parts per hundred UO_1000167 "A dimensionless concentration notation which denotes the amount of a given substance in a total amount of 100 regardless of the units of measure as long as they are the same." [UOC:GVG]
UO_0000168 parts per thousand UO_0000166 "A dimensionless concentration notation which denotes the amount of a given substance in a total amount of 1000 regardless of the units of measure as long as they are the same." [UOC:GVG]
UO_0000169 parts per million UO_1000169 "A dimensionless concentration notation which denotes the amount of a given substance in a total amount of 1,000,000 regardless of the units of measure used as long as they are the same or 1 part in 10^[6]." [UOC:GVG]
UO_0000170 parts per billion UO_1000170 "A dimensionless concentration notation which denotes the amount of a given substance in a total amount of 1,000,000,000 regardless of the units of measure as long as they are the same or 1 part in 10^[9]." [UOC:GVG]
UO_0000171 parts per trillion UO_1000171 "A dimensionless concentration notation which denotes the amount of a given substance in a total amount of 1,000,000,000 regardless of the units of measure used as long as they are the same or 1 part in 10^[12]." [UOC:GVG]
UO_0000172 parts per quadrillion UO_0000166 "A dimensionless concentration notation which denotes the amount of a given substance in a total amount of 1,000,000,000,000 regardless of the units of measure used as long as they are the same or 1 part in 10^[15]." [UOC:GVG]
UO_0000173 gram per milliliter UO_1000173 "A mass unit density which is equal to mass of an object in grams divided by the volume in milliliter." [UOC:GVG]
UO_0000174 kilogram per liter UO_0000052 "A mass unit density which is equal to mass of an object in kilograms divided by the volume in liters." [UOC:GVG]
UO_0000175 gram per liter UO_0000052 "A mass unit density which is equal to mass of an object in grams divided by the volume in liters." [UOC:GVG]
UO_0000176 milligram per milliliter UO_0000052 "A mass unit density which is equal to mass of an object in milligrams divided by the volume in milliliters." [UOC:GVG]
UO_0000177 unit per volume unit UO_0000051 "A concentration unit which is a standard measure of the number of units, as an agreed arbitrary amount, of a given substance per a specific volume of solution." [Webmd:Webmd]
UO_0000178 unit per milliliter UO_0000177 "A unit per milliliter unit which is equal to one unit of an agreed arbitrary amount per one milliliter." [Webmd:Webmd]
UO_0000179 unit per liter UO_0000177 "A unit per milliliter unit which is equal to one unit of an agreed arbitrary amount per one liter." [UOC:GVG]
UO_0000180 mass per unit volume UO_1000180 "A concentration unit which is a standard measure of the mass of a substance in a given volume (density)." [Wikipedia:Wikipedia]
UO_0000181 enzyme unit UO_1000181 "A catalytic unit activity which is equal to the amount of the enzyme that catalyzes the conversion of 1 micro mole of substrate per minute." [Wikipedia:Wikipedia]
UO_0000182 density unit UO_0000000 "A unit which is a standard measure of the influence exerted by some mass." [Wikipedia:Wikipedia]
UO_0000183 linear density unit UO_0000182 "A density unit which is a standard measure of the mass exerting an influence on a one-dimensional object." [Wikipedia:Wikipedia]
UO_0000184 kilogram per meter UO_0000183 "An area density unit which is equal to the mass of an object in kilograms divided by one meter." [NIST:NIST]
UO_0000185 degree UO_1000185 "A plane angle unit which is equal to 1/360 of a full rotation or 1.7453310^[-2] rad." [Wikipedia:Wikipedia]
UO_0000186 dimensionless unit UO_0000000 "A unit which is a standard measure of physical quantity consisting of only a numerical number without any units." [Wikipedia:Wikipedia]
UO_0000187 percent UO_0000190 "A dimensionless ratio unit which denotes numbers as fractions of 100." [Wikipedia:Wikipedia]
UO_0000188 pi UO_1000188 "A dimensionless unit which denoted an irrational real number, approximately equal to 3.14159 which is the ratio of a circle's circumference to its diameter in Euclidean geometry." [Wikipedia:Wikipedia]
UO_0000189 count unit UO_0000186 "A dimensionless unit which denotes a simple count of things." [MGED:MGED]
UO_0000190 ratio UO_0000186 "A dimensionless unit which denotes an amount or magnitude of one quantity relative to another." [Wikipedia:Wikipedia]
UO_0000191 fraction UO_0000190 "A dimensionless ratio unit which relates the part (the numerator) to the whole (the denominator)." [Wikipedia:Wikipedia]
UO_0000192 molecule count UO_1000192 "A dimensionless count unit which denotes the number of molecules." [MGED:MGED]
UO_0000193 purity percentage UO_1000193 "A dimensionless percent unit which denotes the homogeneity of a biomaterial." [MGED:MGED]
UO_0000194 confluence percentage UO_1000194 "A dimensionless percent unit which denotes the density of an attached or monolayer culture (e.g., cell culture)." [MGED:MGED]
UO_0000195 degree Fahrenheit UO_1000195 "A temperature unit which is equal to 5/9ths of a kelvin. Negative 40 degrees Fahrenheit is equal to negative 40 degrees Celsius." [Wikipedia:Wikipedia]
UO_0000196 pH UO_0000186 "A dimensionless concentration notation which denotes the acidity of a solution in terms of activity of hydrogen ions (H+)." [Wikipedia:Wikipedia]
UO_0000197 liter per kilogram UO_0000059 "A specific volume unit which is equal to one liter volume occupied by one kilogram of a particular substance." [NIST:NIST]
UO_0000198 milliliter per kilogram UO_0000059 "A specific volume unit which is equal to a thousandth of a liter per kilogram or 10^[-3] l/kg." [NIST:NIST]
UO_0000199 microliter per kilogram UO_0000059 "A specific volume unit which is equal to one millionth of a liter per kilogram or 10^[-6] l/kg." [NIST:NIST]
UO_0000200 cell concentration unit UO_0000051 "A concentration unit which denotes the average cell number in a given volume." [Bioedonline:Bioedonline]
UO_0000201 cells per milliliter UO_0000200 "A unit of cell concentration which is equal to one cell in a volume of 1 milliliter." [Bioedonline:Bioedonline]
UO_0000202 catalytic (activity) concentration unit UO_0000051 "A concentration unit which is a standard measure of the amount of the action of a catalyst in a given volume." [UOC:GVG]
UO_0000203 katal per cubic meter UO_1000203 "A catalytic (activity) concentration unit which is equal to 1 katal activity of a catalyst in a given volume of one cubic meter." [NIST:NIST]
UO_0000204 katal per liter UO_1000204 "A catalytic (activity) concentration unit which is equal to 1 katal activity of a catalyst in a given volume of one thousandth of a cubic meter." [NIST:NIST]
UO_0000205 volume per unit volume UO_0000051 "A dimensionless concentration unit which denotes the given volume of the solute in the total volume of the resulting solution." [NIST:NIST]
UO_0000206 milliliter per cubic meter UO_0000205 "A volume per unit volume unit which is equal to one millionth of a liter of solute in one cubic meter of solution." [NIST:NIST]
UO_0000207 milliliter per liter UO_0000205 "A volume per unit volume unit which is equal to one millionth of a liter of solute in one liter of solution." [NIST:NIST]
UO_0000208 gram per deciliter UO_0000052 "A mass density unit which is equal to mass of an object in grams divided by the volume in deciliters." [UOC:GVG]
UO_0000209 deciliter UO_1000099 "A volume unit which is equal to one tenth of a liter or 10^[-1] L." [NIST:NIST]
UO_0000210 colony forming unit UO_0000189 "A dimensionless count unit which a measure of viable bacterial numbers." [Wikipedia:Wikipedia]
UO_0000211 plaque forming unit UO_0000189 "A dimensionless count unit which a measure of plague forming units in a given volume." [Wikipedia:Wikipedia]
UO_0000212 colony forming unit per volume UO_0000051 "A concentration unit which a measure of viable bacterial numbers in a given volume." [Wikipedia:Wikipedia]
UO_0000213 colony forming unit per milliliter UO_0000212 "A colony forming unit which a measure of viable bacterial numbers in one milliliter." [Wikipedia:Wikipedia]
UO_0000214 plaque forming unit per volume UO_0000051 "A concentration unit which a measure of plague forming units in a given volume." [UOC:GVG]
UO_0000215 plaque forming unit per milliliter UO_0000214 "A concentration unit which a measure of plague forming units in one milliliter." [UOC:GVG]
UO_0000216 disintegrations per second UO_0000128 "An activity (of a radionuclide) unit which is equal to the activity of a quantity of radioactive material in which one nucleus decays per second or there is one atom disintegration per second." [ORCBS:ORCBS]
UO_0000217 electric potential difference unit UO_0000000 "A unit which is a standard measure of the work done per unit charge as a charge is moved between two points in an electric field." [Wikipedia:Wikipedia]
UO_0000218 volt UO_1000218 "An electric potential difference unit which is equal to the work per unit charge. One volt is the potential difference required to move one coulomb of charge between two points in a circuit while using one joule of energy." [Wikipedia:Wikipedia]
UO_0000219 electric charge UO_0000000 "A unit which is a standard measure of the quantity of unbalanced electricity in a body (either positive or negative) and construed as an excess or deficiency of electrons." [WordNet:WordNet]
UO_0000220 coulomb UO_1000220 "An electrical charge unit which is equal to the amount of charge transferred by a current of 1 ampere in 1 second." [WordNet:WordNet]
UO_0000221 dalton UO_0000002 "An independently to the base SI units defined mass unit which is equal to one twelfth of the mass of an unbound atom of the carbon-12 nuclide, at rest and in its ground state." [Wikipedia:Wikipedia]
UO_0000222 kilodalton UO_0000002 "A mass unit which is equal to one thousand daltons." [Wikipedia:Wikipedia]
UO_0000223 watt-hour UO_1000223 "An energy unit which is equal to the amount of electrical energy equivalent to a one-watt load drawing power for one hour." [Wikipedia:Wikipedia]
UO_0000224 kilowatt-hour UO_1000223 "An energy unit which is equal to 1,000 watt-hours." [Wikipedia:Wikipedia]
UO_0000225 magnetic flux unit UO_0000000 "A unit which is a standard measure of quantity of magnetism, taking account of the strength and the extent of a magnetic field." [Wikipedia:Wikipedia]
UO_0000226 weber UO_1000226 "A magnetic flux unit which is equal to the amount of flux that when linked with a single turn of wire for an interval of one second will induce an electromotive force of one volt." [ScienceLobby:ScienceLobby]
UO_0000227 magnetic flux density unit UO_0000000 "A unit which is a standard measure of the strength of a magnetic field." [allnet:allnet]
UO_0000228 tesla UO_0000227 "A magnetic flux density unit which is equal to one weber per square meter." [WordNet:WordNet]
UO_0000229 volt-hour UO_1000229 "A magnetic flux unit which is equal to 3600 Wb." [UOC:GVG]
UO_0000230 kilovolt-hour UO_1000229 "A magnetic flux unit which is equal to one thousand volt-hours." [UOC:GVG]
UO_0000231 information unit UO_0000000 "A unit which is a standard measure of the amount of information." [Wikipedia:Wikipedia]
UO_0000232 bit UO_0000231 "An information unit which refers to a digit in the binary numeral system, which consists of base 2 digits (ie there are only 2 possible values: 0 or 1)." [Wikipedia:Wikipedia]
UO_0000233 byte UO_0000231 "An information unit which is equal to 8 bits." [Wikipedia:Wikipedia]
UO_0000234 kilobyte UO_0000231 "An information unit which is equal to 1000 bytes." [Wikipedia:Wikipedia]
UO_0000235 megabyte UO_0000231 "An information unit which is equal to 1000 kB." [Wikipedia:Wikipedia]
UO_0000236 image resolution unit UO_0000231 "An information unit which is a standard measure of the detail an image holds." [Wikipedia:Wikipedia]
UO_0000237 chroma sampling unit UO_1000237 "An image resolution unit which is a standard measure of the amount of spatial detail in an image." [Wikipedia:Wikipedia]
UO_0000238 dynamic range unit UO_1000238 "An image resolution unit which is a standard measure of the amount of contrast available in a pixel." [Wikipedia:Wikipedia]
UO_0000239 spatial resolution unit UO_0000236 "An image resolution unit which is a standard measure of the way luminance and chrominance may be sampled at different levels." [Wikipedia:Wikipedia]
UO_0000240 dots per inch UO_0000239 "A spatial resolution unit which is a standard measure of the printing resolution, in particular the number of individual dots of ink a printer or toner can produce within a linear one-inch space." [Wikipedia:Wikipedia]
UO_0000241 micron pixel UO_0000239 "A spatial resolution unit which is equal to a pixel size of one micrometer." [Wikipedia:Wikipedia]
UO_0000242 pixels per inch UO_0000239 "A spatial resolution unit which is a standard measure of the resolution of a computer display, related to the size of the display in inches and the total number of pixels in the horizontal and vertical directions." [Wikipedia:Wikipedia]
UO_0000243 pixels per millimeter UO_0000239 "A spatial resolution unit which is a standard measure of the number of pixels in one millimeter length or width of a digital image divided by the physical length or width of a printed image." [Wikipedia:Wikipedia]
UO_0000244 base pair UO_0000189 "A count unit which contains one nucleotide." [UO:GVG]
UO_0000245 kibibyte UO_0000231 "An information unit which is equal to 1024 B." [NIST:NIST]
UO_0000246 mebibyte UO_0000231 "An information unit which is equal to 1024 KiB." [NIST:NIST]
UO_0000247 millivolt UO_1000218 "An electric potential difference unit which is equal to one thousandth of a volt or 10^[-3] V." [UOC:GVG]
UO_0000248 kilovolt UO_1000218 "An electric potential difference unit which is equal to one thousand volts or 10^[3] V." [UOC:GVG]
UO_0000249 microvolt UO_1000218 "An electric potential difference unit which is equal to one millionth of a volt or 10^[-6] V." [UOC:GVG]
UO_0000250 nanovolt UO_1000218 "An electric potential difference unit which is equal to one billionth of a volt or 10^[-12] V." [UOC:GVG]
UO_0000251 picovolt UO_1000218 "An electric potential difference unit which is equal to one trillionth of a volt or 10^[-12] V." [UOC:GVG]
UO_0000252 megavolt UO_1000218 "An electric potential difference unit which is equal to one million volts or 10^[6] V." [UOC:GVG]
UO_0000253 surface tension unit UO_0000000 "A unit which is a standard measure of the ability of a liguid to attraction of molecules at its surface as a result of unbalanced molecular cohesive forces." [NIST:NIST]
UO_0000254 newton per meter UO_1000254 "A surface tension unit which is equal to one newton per meter." [NIST:NIST]
UO_0000255 dyne per cm UO_1000255 "A surface tension unit which is equal to one dyne per centimeter." [Wikipedia:Wikipedia]
UO_0000256 viscosity unit UO_0000000 "A unit which is a standard measure of the internal resistance of fluids to flow." [UOC:GVG]
UO_0000257 pascal second UO_1000257 "A viscosity unit which is equal to one pascale per second." [NIST:NIST]
UO_0000258 poise UO_1000258 "A viscosity unit which is equal to one dyne second per square centimeter." [Wikipedia:Wikipedia]
UO_0000259 decibel UO_0000190 "A ratio unit which is an indicator of sound power per unit area." [techtarget:techtarget]
UO_0000260 effective dose unit UO_0000127 "A unit which is a standard measure of the estimate of the stochastic effect that a non-uniform radiation dose has on a human." [Wikipedia:Wikipedia]
UO_0000261 conduction unit UO_0000000 "A unit which represents a standard measurement of the transmission of an entity through a medium." [UOC:GVG]
UO_0000262 electrical conduction unit UO_0000261 "A unit which represents a standard measurement of the movement of electrically charged particles through a transmission medium (electrical conductor)." [UOC:GVG]
UO_0000263 heat conduction unit UO_0000261 "A unit which represents a standard measurement of the spontaneous transfer of thermal energy through matter, from a region of higher temperature to a region of lower temperature." [Wikipedia:Wikipedia]
UO_0000264 siemens UO_0000262 "An electrical conduction unit which is equal to A/V." [NIST:NIST]
UO_0000265 watt per meter kelvin UO_0000263 "An heat conduction unit which is equal to one watt divided by meter kelvin." [NIST:NIST]
UO_0000266 electronvolt UO_0000111 "A non-SI unit of energy (eV) defined as the energy acquired by a single unbound electron when it passes through an electrostatic potential difference of one volt. An electronvolt is equal to 1.602 176 53(14) x 10^-19 J." [Wikipedia:Wikipedia]
UO_0000267 electric field strength unit UO_0000000 "The electric field strength is a unit which is a measure of the potential difference between two points some distance apart." [Wikipedia:http://en.wikipedia.org/wiki/Electric_field]
UO_0000268 volt per meter UO_0000267 "The volt per meter is a unit of electric field strength equal to the a potential difference of 1 volt existing between two points that are 1 meter apart." [Wikipedia:http://en.wikipedia.org/wiki/Electric_field]
UO_0000269 absorbance unit UO_1000269 "A dimensionless logarithmic unit assigned to a measure of absorbance of light through a partially absorbing substance, defined as -log10(I/I_0) where I = transmitted light and I_0 = incident light." [Wikipedia:http://en.wikipedia.org/wiki/Absorbance]
UO_0000270 volumetric flow rate unit UO_0000000 "A unit which is a standard measure of the volume of fluid which passes through a given surface per unit time ." [Wikipedia:Wikipedia]
UO_0000271 microliters per minute UO_0000270 "A volumetric flow rate unit which is equal to one microliter volume through a given surface in one minute." [UOC:GVG]
UO_0000272 millimetres of mercury UO_0000109 "A unit of pressure equal to the amount of fluid pressure one millimeter deep in mercury at zero degrees centigrade on Earth." [url:en.wiktionary.org/wiki/mmHg]
UO_0000273 milligram per liter UO_0000052 "A mass unit density which is equal to mass of an object in milligrams divided by the volume in liters." [UOC:GVG]
UO_0000274 microgram per milliliter UO_1000173 "A mass unit density which is equal to mass of an object in micrograms divided by the volume in millliters." [UOC:GVG]
UO_0000275 nanogram per milliliter UO_1000173 "A mass unit density which is equal to mass of an object in nanograms divided by the volume in milliliters." [UOC:GVG]
UO_0000276 amount per container UO_0000051 "A concentration unit which is a standard measure of the amount of a substance in a given container." [UOC:GVG]
UO_0000277 ug/disk UO_0000276 "A unit which is equal to one microgram per disk, where a disk is some physical surface/container upon which the substance is deposited." [UOC:MD]
UO_0000278 nmole/disk UO_0000276 "A unit which is equal to one nanomole per disk, where a disk is some physical surface/container upon which the substance is deposited." [UOC:MD]
UO_0000279 milliunits per milliliter UO_0000177 "A unit per milliliter unit which is equal to one thousandth of a unit of an agreed arbitrary amount per one milliliter." [UOC:GVG]
UO_0000280 rate unit UO_0000000 "A unit which represents a standard measurement occurrence of a process per unit time." [UOC:GVG]
UO_0000281 count per nanomolar second UO_1000281 "A rate unit which is equal to one over one nanomolar second." [UOC:GVG]
UO_0000282 count per molar second UO_1000282 "A rate unit which is equal to one over one molar second." [UOC:GVG]
UO_0000283 kilogram per hectare UO_0000054 "An area density unit which is equal to the mass of an object in kilograms divided by the surface area in hectares." [UO:GVG]
UO_0000284 count per nanomolar UO_1000284 "A rate unit which is equal to one over one nanomolar." [UO:GVG]
UO_0000285 count per molar UO_1000285 "A rate unit which is equal to one over one molar." [UO:GVG]
UO_0000286 yotta UO_0000046 "A prefix in the metric system denoting a factor of ten to the power of 24." [UO:GVG]
UO_0000287 hecto UO_0000046 "A prefix in the metric system denoting a factor of one hundred." [UO:GVG]
UO_0000288 zetta UO_0000046 "A prefix in the metric system denoting a factor of ten to the power of 21." [UO:GVG]
UO_0000289 exa UO_0000046 "A prefix in the metric system denoting a factor of ten to the power of 18." [UO:GVG]
UO_0000290 peta UO_0000046 "A prefix in the metric system denoting a factor of ten to the power of 15." [UO:GVG]
UO_0000291 tera UO_0000046 "A prefix in the metric system denoting a factor of ten to the power of 12." [UO:GVG]
UO_0000292 giga UO_0000046 "A prefix in the metric system denoting a factor of ten to the power of 9." [UO:GVG]
UO_0000293 mega UO_0000046 "A prefix in the metric system denoting a factor of million." [UO:GVG]
UO_0000294 kilo UO_0000046 "A prefix in the metric system denoting a factor of one thousand." [UO:GVG]
UO_0000295 deca UO_0000046 "A prefix in the metric system denoting a factor of ten." [UO:GVG]
UO_0000296 deci UO_0000046 "A prefix in the metric system denoting a factor of one tenth." [UO:GVG]
UO_0000297 milli UO_0000046 "A prefix in the metric system denoting a factor of one thousand." [UO:GVG]
UO_0000298 centi UO_0000046 "A prefix in the metric system denoting a factor of one hundred." [UO:GVG]
UO_0000299 micro UO_0000046 "A prefix in the metric system denoting a factor of 10 to the power of -6." [UO:GVG]
UO_0000300 nano UO_0000046 "A prefix in the metric system denoting a factor of 10 to the power of -9." [UO:GVG]
UO_0000301 microgram per liter UO_0000052 "A mass unit density which is equal to mass of an object in micrograms divided by the volume in liters." [UOC:GVG]
UO_0000302 pico UO_0000046 "A prefix in the metric system denoting a factor of 10 to the power of -12." [GVG:UO]
UO_0000303 femto UO_0000046 "A prefix in the metric system denoting a factor of 10 to the power of -15." [UO:GVG]
UO_0000304 atto UO_0000046 "A prefix in the metric system denoting a factor of 10 to the power of -18." [UO:GVG]
UO_0000305 zepto UO_0000046 "A prefix in the metric system denoting a factor of 10 to the power of -21." [UO:GVG]
UO_0000306 yocto UO_0000046 "A prefix in the metric system denoting a factor of 10 to the power of -24." [UO:GVG]
UO_0000307 dose unit UO_0000051 "A concentration unit which is a standard measure of the amount of a toxic or pharmaceutical substance administered to a recipient subject, expressed in terms of the size of the subject." [UO:PC]
UO_0000308 milligram per kilogram UO_0000307 "A dose unit which is equal to 1 milligram of a toxic or pharmaceutical substance per kilogram body weight of the recipient subject." [UO:PC]
UO_0000309 milligram per square meter UO_0000307 "A dose unit which is equal to 1 milligram of a toxic or pharmaceutical substance per square meter of surface area of the recipient subject." [UO:PC]
UO_0000310 dosage unit UO_1000310 "A concentration unit which is a standard measure of the amount of a toxic or pharmaceutical substance administered over time to a recipient subject, expressed in terms of the size of the subject." [UO:PC]
UO_0000311 milligram per kilogram per day UO_0000310 "A dosage unit which is equal to 1 milligram per day of a toxic or pharmaceutical substance per kilogram body weight of the recipient subject." [UO:PC]
UO_0000312 relative light unit UO_1000312 "A derived unit which is a measure of relative light intensity, as typically measured by a luminometer, spectrophotometer, or fluorimeter in biological research applications." [UO:PC]
UO_0000313 relative luminescence unit UO_1000313 "A relative light unit which is a measure of relative luminescence intensity." [UO:PC]
UO_0000314 relative fluorescence unit UO_1000314 "A relative light unit which is a measure of relative fluorescence intensity." [UO:PC]
UO_0000315 turbidity unit UO_0000000 "A unit used to indicate the clarity of water or other solutions or suspensions, as measured by the ability of the solution or suspension to scatter light of a defined wavelength range." [UO:PC]
UO_0000316 cells per microliter UO_0000200 "A unit of cell concentration which is equal to one cell in a volume of 1 microliter." [UO:GVG]
UO_0000317 cells per well UO_0000200 "A unit of cell concentration which is equal to 1 cell in a well or discrete container of arbitrary volume." [UO:PC]
UO_0000318 formazin nephelometric unit UO_0000315 "1000 formazin turbidity units (FNU) on the empirical formazin turbidity scale represents reflectance of insol. reaction products of 0.0725 g hydrazine sulfate with 0.7250 g hexamethylenetetramine diluted to 1 L." [AOAC:192]
UO_0000319 radioactivity concentration UO_0000051 "A concentration unit which is a standard measure of the amount of radioactivity in a given volume." [UO:GVG]
UO_0000320 curie per liter UO_0000319 "A unit of radioactivity concentration which is equal to one curie in a volume of 1 liter." [UO:GVG]
UO_0000321 microcurie per milliliter UO_0000319 "A unit of radioactivity concentration which is equal to one micro curie in a volume of 1 liter." [UO:GVG]
UO_0000322 fold dilution UO_0000186 "A unit that is the ratio of concentration of two solutions of interest, typically with one solution derived from the other by the addition of solvent." [UO:PC]
UO_0000323 ton per hectare UO_0000054 "An area density unit which is equal to the mass of an object in tons divided by the surface area in hectares." [UO:GVG]
UO_0000324 square angstrom UO_0000047 "An area unit which is equal to an area enclosed by a square with sides each 1 angstrom long." [UOC:GVG]
UO_0000325 megaHertz UO_0000105 "A frequency unit which is equal to one million hertz or 10^[6] V." [UOC:GVG]
UO_0000326 centiMorgan UO_0000001 "A unit used to express distances on a genetic map. In genetic mapping, distances between markers are determined by measuring the rate of meoitic recombination between them, which increases proportionately with the distance separating them. A cM is defined as the length of an interval in which there is a 1% probability of recombination. On the average, 1 cM is roughly equivalent to 1 megabase (Mb) of DNA, although this can vary widely due to hot and cold spots of recombination." [NCBI:http://www.ncbi.nlm.nih.gov/SCIENCE96/Glossary.html]
UO_0000327 centiRay UO_0000001 "A unit of genetic map distance defined corresponding to an interval in which there is a 1% probability of X-irradiation induced breakage. To be completely specified, the unit must be qualified by the radiation in dosage in rads (e.g. cR8000), because this determines the actual breakage probability." [NCBI:http://www.ncbi.nlm.nih.gov/SCIENCE96/Glossary.html]
UO_0000328 kilo base pair UO_0000244 "A unit equal to one thousand base pairs." [UOC:GVG]
UO_0000329 mega base pair UO_0000244 "A unit equal to one million base pairs" [UOC:GVG]
UO_0000330 giga base pair UO_0000244 "A unit equal to one billion base pairs." [UOC:GVG]
UO_0000331 gigabyte UO_0000231 "An information unit which is equal to 1000000000 bytes." [UO:GVG]
UO_0000332 terabyte UO_0000231 "An information unit which is equal to 1000 gigabytes." [UO:GVG]
UO_0010001 square micrometer UO_1010001 "An area unit which is equal to an area enclosed by a square with sides each 1 micrometer long." [NIST:NIST]
UO_0010002 millisiemens UO_0000262 "An electrical conduction unit which is equal to one thousandth of a siemen or 10^[-3] siemens." [NIST:NIST]
UO_0010003 micromole per litre UO_0000067 "A specific concentration unit which is equal to 1 micromole in a given volume of one thousandth of a cubic meter." [NIST:NIST]
UO_0010004 micromole per kilogram UO_0000067 "A specific concentration unit which is equal to 1 micromole of a given substance per kilogram of solvent." [UOB:LKSR]
UO_0010005 millimeters per day UO_0000060 "A speed/velocity unit which is equal to the speed of an object traveling 1 millimeter distance in one day." [UOB:LKSR]
UO_0010006 ratio UO_0000190 "A dimensionless ratio unit which, given a pair of quantities a and b, for which b is a multiple of a, denotes b by giving the multiplier (coefficient) c for a to result in b." [UOB:LKSR]
UO_0010007 volt-second per square centimeter UO_0000262 "An electrical mobility unit which is equal to one volt second per square centimeter." [UOB:LKSR]
UO_0010008 kilometer per hour UO_0000060 "A speed/velocity unit which is equal to the speed of an object traveling 1 kilometer distance in one hour." [NIST:NIST]
UO_0010009 milli UO_0000002 "A mass unit which is equal to 1/12 the mass of 12C" [Wikipedia:Wikipedia]
UO_0010010 hectare UO_1010010 "An area unit which is equal to an area of 10,000 square meters. Equivalent to 2.471 acres." [Wikipedia:Wikipedia]
UO_0010011 inch UO_0000001 "A length unit which is equal to 0.0254 metres." [Wikipedia:Wikpiedia]
UO_0010012 thou UO_0000001 "A length unit which is equal to 0.0254 millimetres." [Wikipedia:Wikpiedia]
UO_0010013 foot UO_0000001 "A length unit which is equal to 0.3048 metres, or 12 inches." [Wikipedia:Wikpiedia]
UO_0010014 yard UO_0000001 "A length unit which is equal to 0.9144 metres, or 3 feet." [Wikipedia:Wikpiedia]
UO_0010015 chain UO_1010015 "A length unit which is equal to 20.1168 metres, 66 feet, or 22 yards." [Wikipedia:Wikpiedia]
UO_0010016 furlong UO_1010016 "A length unit which is equal to 20,116.8 metres, 660 feet, or 10 chains." [Wikipedia:Wikpiedia]
UO_0010017 mile UO_0000001 "A length unit which is equal to 1,609.344 metres, or 8 furlongs." [Wikipedia:Wikpiedia]
UO_0010018 league UO_0000001 "A length unit which is equal to 3 miles, or 4,828.032 metres" [Wikipedia:Wikpiedia]
UO_0010019 maritime length unit UO_0000001 "A maritime length unit is one used primarily at sea." [Wikipedia:Wikpiedia]
UO_0010020 fathom UO_1010020 "A maritime length unit which is equal to 6.08 feet, or 1.853184 metres" [Wikipedia:Wikpiedia]
UO_0010021 cable UO_1010021 "A maritime length unit which is equal to 608 feet, 100 fathoms, or 185.3184 metres" [Wikipedia:Wikpiedia]
UO_0010022 nautical mile UO_1010022 "A maritime length unit which is equal to 6,080 feet, 10 cables, or 1,853.184 metres" [Wikipedia:Wikpiedia]
UO_0010023 perch UO_0000047 "An area unit which is equal to an area of 25.292,852,64 square meters, or 1 square rod." [Wikipedia:Wikipedia]
UO_0010024 rood UO_1010024 "An area unit which is equivalent to 1 furlong x 1 rod. This is equal to an area of 1,011.714,1056 square meters, or 40 square rods." [Wikipedia:Wikipedia]
UO_0010025 acre UO_1010025 "An area unit which is equivalent to 1 furlong x 1 chain. This is equal to an area of 4,046.856,4224 square meters, or 43,500 square feet." [Wikipedia:Wikipedia]
UO_0010026 fluid ounce UO_0000095 "An imperial volume unit which is equivalent to 28.413,0625 millilitres." [Wikipedia:Wikipedia]
UO_0010027 gill UO_0000095 "An imperial volume unit which is equivalent to 142.065,3125 millilitres." [Wikipedia:Wikipedia]
UO_0010028 pint UO_0000095 "An imperial volume unit which is equivalent to 568.261,25 millilitres." [Wikipedia:Wikipedia]
UO_0010029 quart UO_1010029 "An imperial volume unit which is equivalent to 1,136.5225 millilitres, or two pints." [Wikipedia:Wikipedia]
UO_0010030 gallon UO_0000095 "An imperial volume unit which is equivalent to 4,546.09 millilitres, or 8 pints." [Wikipedia:Wikipedia]
UO_0010031 grain UO_0000002 "An imperial mass unit which is equivalent to 64.798,91 milligrams." [Wikipedia:Wikipedia]
UO_0010032 drachm UO_0000002 "An imperial mass unit which is equivalent to 1.771,845,195,3125 grams, or 1/256 of 1 pound." [Wikipedia:Wikipedia]
UO_0010033 ounce UO_0000002 "An imperial mass unit which is equivalent to 28.349,523,125 grams, or 1/16 of 1 pound." [Wikipedia:Wikipedia]
UO_0010034 pound UO_0000002 "An imperial mass unit which is equivalent to 453.592,37 grams." [Wikipedia:Wikipedia]
UO_0010035 stone UO_0000002 "An imperial mass unit which is equivalent to 6,350.293,18 grams, or 14 pounds." [Wikipedia:Wikipedia]
UO_0010036 quarter UO_1010036 "An imperial mass unit which is equivalent to 12.700,586,36 kilograms, or 28 pounds." [Wikipedia:Wikipedia]
UO_0010037 hundredweight UO_1010037 "An imperial mass unit which is equivalent to 50.802,345,44 kilograms, 112 pounds, or 8 stone." [Wikipedia:Wikipedia]
UO_0010038 ton UO_0000002 "An imperial mass unit which is equivalent to 1,016.046,9088 kilograms, or 2,240 pounds." [Wikipedia:Wikipedia]
UO_0010039 slug UO_1010039 "An imperial gravitational unit which is equivalent to a mass that accelerates by 1ft/s?? when a force of one pound (lbf) is exerted on it." [Wikipedia:Wikipedia]
UO_0010040 teaspoon UO_0000095 "A metric teaspoon is a unit of measurement of volume widely used in cooking recipes and pharmaceutic prescriptions. It equals a 5mL volume." [Wikipedia:https://en.wikipedia.org/wiki/Teaspoon]
UO_0010041 united states customary teaspoon UO_0000095 "A United States customary units teaspoon is a unit of measurement of volume widely used in cooking recipes and pharmaceutic prescriptions in America. It equals a 4.93 mL volume." [Wikipedia:https://en.wikipedia.org/wiki/United_States_customary_units#Cooking_measures]
UO_0010042 tablespoon UO_0000095 "A metric tablespoon is a unit of measurement of volume widely used in cooking recipes and pharmaceutic prescriptions. It equals a 15mL volume." [Wikipedia:https://en.wikipedia.org/wiki/Tablespoon]
UO_0010043 australian metric tablespoon UO_0000095 "An Australian metric tablespoon is a unit of measurement of volume used in Australia for cooking recipes and pharmaceutic prescriptions. It equals a 20mL volume." [Wikipedia:https://en.wikipedia.org/wiki/Tablespoon]
UO_0010044 united states customary tablespoon UO_0000095 "A United States customary units tablespoon is a unit of measurement of volume widely used in cooking recipes and pharmaceutic prescriptions in America. It equals a 14.79 mL volume." [Wikipedia:https://en.wikipedia.org/wiki/United_States_customary_units#Cooking_measures]
UO_0010045 metric cup UO_0000095 "A metric cup is a unit of measurement of volume widely used in cooking recipes and pharmaceutic prescriptions. It equals a 250mL volume." [Wikipedia:https://en.wikipedia.org/wiki/Cooking_weights_and_measures]
UO_0010046 united states customary cup UO_0000095 "A United States customary units cup is a unit of measurement of volume widely used in cooking recipes and pharmaceutic prescriptions in America. It equals a 236.59 mL volume." [Wikipedia:https://en.wikipedia.org/wiki/United_States_customary_units#Cooking_measures]
UO_0010047 united states fda cup UO_0000095 "A United States FDA cup is a unit of measurement of volume used by the US Federal Department of Agriculture as a nutritional serving measure. It equals a 240 mL volume." [Wikipedia:https://en.wikipedia.org/wiki/United_States_customary_units#Cooking_measures]
UO_0010048 micromole UO_0000006 "A substance unit which is equal to one millionth of a mole." [UOB:LTS]
UO_0010049 gram per square meter UO_0000054 "An area density unit which is equal to the mass of an object in grams divided by the surface area in meters squared." [NIST:NIST]
UO_0010050 nanogram per microliter UO_0000052 "A mass unit density which is equal to mass of an object in nanograms divided by the volume in microliters." [UOB:LTS]
UO_0010051 large calorie UO_0000111 "A unit of energy widely used in nutrition, equivalent to the amount of heat needed to cause one kilogram of water to rise in temperature by one degree Celsius." [Wikipedia:Wikipedia]
UO_0010052 pounds per square inch UO_0000109 "A pressure unit which is equal to 6894.757 pascal." [Wikipedia:Wikipedia]
UO_0010053 micrograms per wheaton bottle UO_0000052 "A unit of mass concentration defined as the number of micrograms of a substance per 250 ml Wheaton bottle." [UOB:LTS]
UO_0010054 picoampere UO_1000011 "An electric current unit current which is equal to one trillionth of an ampere or 10^[-12] A." [UOB:LTS]
UO_0010055 centigray UO_1000134 "An absorbed dose unit which is equal to 0.01 gray (Gy)"
UO_0010056 gigaelectronvolt UO_0000111 "A unit of energy that is equal to one thousand million electronvolts."
UO_0010057 gigaelectronvolt per nucleon UO_0000111 "Derived unit which is equal to the total kinetic energy of an atomic nucleus in GeV divided by the number of nucleons in the nucleus"
UO_0010058 megaelectronvolt per nucleon UO_0000111 "Derived unit which is equal to the total kinetic energy of an atomic nucleus in MeV divided by the number of nucleons in the nucleus"
UO_0010059 kiloelectronvolt per micron UO_0000111 "A derived unit equal to the energy deposited by ionizing radiation per micron of path length in matter"
UO_0010060 gray per minute UO_1010060 "A derived absorbed dose unit which is equal to one gray absorbed per minute."
UO_0010061 centigray per minute UO_1010060 "A derived absorbed dose unit which is equal to one centigray absorbed per minute."
UO_0010062 milligray per minute UO_1010060 "A derived absorbed dose unit which is equal to one milligray absorbed per minute."
UO_0010063 milligray per day UO_0000129 "A derived absorbed dose unit which is equal to one milligray absorbed per day."
UO_1000008 meter based unit UO_0000001
UO_1000010 second based unit UO_0000003
UO_1000011 ampere based unit UO_0000004
UO_1000012 kelvin based unit UO_0000005
UO_1000013 mole based unit UO_0000006
UO_1000014 candela based unit UO_0000007
UO_1000019 angstrom based unit UO_0000001
UO_1000021 gram based unit UO_0000002
UO_1000027 degree Celsius based unit UO_0000005
UO_1000031 minute based unit UO_0000003
UO_1000032 hour based unit UO_0000003
UO_1000033 day based unit UO_0000003
UO_1000034 week based unit UO_0000003
UO_1000035 month based unit UO_0000003
UO_1000036 year based unit UO_0000003
UO_1000062 molar based unit UO_0000061
UO_1000068 molal based unit UO_0000067
UO_1000075 normal based unit UO_0000074
UO_1000076 mole fraction based unit UO_0000191
UO_1000077 meter per second per second based unit UO_0000048
UO_1000078 radian per second per second based unit UO_0000050
UO_1000079 radian per second based unit UO_0000049
UO_1000080 square meter based unit UO_0000047
UO_1000081 square centimeter based unit UO_0000047
UO_1000082 square millimeter based unit UO_0000047
UO_1000084 gram per cubic centimeter based unit UO_0000052
UO_1000085 candela per square meter based unit UO_0000053
UO_1000088 gram per mole based unit UO_0000055
UO_1000089 cubic meter per mole based unit UO_0000056
UO_1000090 cubic centimeter per mole based unit UO_0000056
UO_1000092 turns per second based unit UO_0000058
UO_1000093 cubic meter per kilogram based unit UO_0000059
UO_1000094 meter per second based unit UO_0000060
UO_1000096 cubic meter based unit UO_0000095
UO_1000097 cubic centimeter based unit UO_0000095
UO_1000099 liter based unit UO_0000095
UO_1000100 cubic decimeter based unit UO_0000095
UO_1000106 hertz based unit UO_0000105
UO_1000108 newton based unit UO_0000107
UO_1000110 pascal based unit UO_0000109
UO_1000112 joule based unit UO_0000111
UO_1000114 watt based unit UO_0000113
UO_1000116 lux based unit UO_0000115
UO_1000118 lumen based unit UO_0000117
UO_1000120 katal based unit UO_0000119
UO_1000123 radian based unit UO_0000122
UO_1000125 steradian based unit UO_0000124
UO_1000132 becquerel based unit UO_0000128
UO_1000133 curie based unit UO_0000128
UO_1000134 gray based unit UO_0000129
UO_1000135 rad based unit UO_0000129
UO_1000136 roentgen based unit UO_0000131
UO_1000137 sievert based unit UO_0000130
UO_1000140 Roentgen equivalent man based unit UO_0000130
UO_1000147 disintegrations per minute based unit UO_0000128
UO_1000148 counts per minute based unit UO_0000128
UO_1000151 century based unit UO_0000003
UO_1000152 half life based unit UO_0000003
UO_1000153 foot candle based unit UO_0000115
UO_1000155 watt per square meter based unit UO_0000154
UO_1000156 einstein per square meter per second based unit UO_0000154
UO_1000158 watt per steradian per square meter based unit UO_0000161
UO_1000162 watt per steradian based unit UO_0000159
UO_1000163 mass percentage based unit UO_0000187
UO_1000164 mass volume percentage based unit UO_0000187
UO_1000165 volume percentage based unit UO_0000205
UO_1000167 parts per hundred based unit UO_0000166
UO_1000168 parts per thousand based unit UO_0000166
UO_1000169 parts per million based unit UO_0000166
UO_1000170 parts per billion based unit UO_0000166
UO_1000171 parts per trillion based unit UO_0000166
UO_1000172 parts per quadrillion based unit UO_0000166
UO_1000173 gram per milliliter based unit UO_0000052
UO_1000175 gram per liter based unit UO_0000052
UO_1000178 unit per milliliter based unit UO_0000177
UO_1000179 unit per liter based unit UO_0000177
UO_1000180 mass per unit volume based unit UO_0000051
UO_1000181 enzyme unit based unit UO_0000119
UO_1000185 degree based unit UO_0000122
UO_1000188 pi based unit UO_0000186
UO_1000192 molecule count based unit UO_0000189
UO_1000193 purity percentage based unit UO_0000187
UO_1000194 confluence percentage based unit UO_0000187
UO_1000195 degree Fahrenheit based unit UO_0000005
UO_1000196 pH based unit UO_0000186
UO_1000197 liter per kilogram based unit UO_0000059
UO_1000201 cells per milliliter based unit UO_0000200
UO_1000203 katal per cubic meter based unit UO_0000202
UO_1000204 katal per liter based unit UO_0000202
UO_1000208 gram per deciliter based unit UO_0000052
UO_1000210 colony forming unit based unit UO_0000189
UO_1000211 plaque forming unit based unit UO_0000189
UO_1000213 colony forming unit per milliliter based unit UO_0000212
UO_1000215 plaque forming unit per milliliter based unit UO_0000214
UO_1000216 disintegrations per second based unit UO_0000128
UO_1000218 volt based unit UO_0000217
UO_1000220 coulomb based unit UO_0000219
UO_1000221 dalton based unit UO_0000002
UO_1000223 watt-hour based unit UO_0000111
UO_1000226 weber based unit UO_0000225
UO_1000228 tesla based unit UO_0000227
UO_1000229 volt-hour based unit UO_0000225
UO_1000232 bit based unit UO_0000231
UO_1000233 byte based unit UO_0000231
UO_1000237 chroma sampling unit based unit UO_0000236
UO_1000238 dynamic range unit based unit UO_0000236
UO_1000240 dots per inch based unit UO_0000239
UO_1000242 pixels per inch based unit UO_0000239
UO_1000243 pixels per millimeter based unit UO_0000239
UO_1000244 base pair based unit UO_0000189
UO_1000245 kibibyte based unit UO_0000231
UO_1000246 mebibyte based unit UO_0000231
UO_1000254 newton per meter based unit UO_0000253
UO_1000255 dyne per cm based unit UO_0000253
UO_1000257 pascal second based unit UO_0000256
UO_1000258 poise based unit UO_0000256
UO_1000260 effective dose unit based unit UO_0000127
UO_1000264 siemens based unit UO_0000262
UO_1000265 watt per meter kelvin based unit UO_0000263
UO_1000266 electronvolt based unit UO_0000111
UO_1000268 volt per meter based unit UO_0000267
UO_1000269 absorbance unit based unit UO_0000186
UO_1000281 count per nanomolar second based unit UO_0000280
UO_1000282 count per molar second based unit UO_0000280
UO_1000284 count per nanomolar based unit UO_0000280
UO_1000285 count per molar based unit UO_0000280
UO_1000310 dosage unit based unit UO_0000051
UO_1000312 relative light unit based unit UO_0000157
UO_1000313 relative luminescence unit based unit UO_0000312
UO_1000314 relative fluorescence unit based unit UO_0000312
UO_1010001 square micrometer based unit UO_0000047
UO_1010010 hectare based unit UO_0000047
UO_1010011 inch based unit UO_0000001
UO_1010012 thou based unit UO_0000001
UO_1010013 foot based unit UO_0000001
UO_1010014 yard based unit UO_0000001
UO_1010015 chain based unit UO_0000001
UO_1010016 furlong based unit UO_0000001
UO_1010017 mile based unit UO_0000001
UO_1010018 league based unit UO_0000001
UO_1010019 maritime length unit based unit UO_0000001
UO_1010020 fathom based unit UO_0010019
UO_1010021 cable based unit UO_0010019
UO_1010022 nautical mile based unit UO_0010019
UO_1010023 perch based unit UO_0000047
UO_1010024 rood based unit UO_0000047
UO_1010025 acre based unit UO_0000047
UO_1010026 fluid ounce based unit UO_0000095
UO_1010027 gill based unit UO_0000095
UO_1010028 pint based unit UO_0000095
UO_1010029 quart based unit UO_0000095
UO_1010030 gallon based unit UO_0000095
UO_1010031 grain based unit UO_0000002
UO_1010032 drachm based unit UO_0000002
UO_1010033 ounce based unit UO_0000002
UO_1010034 pound based unit UO_0000002
UO_1010035 stone based unit UO_0000002
UO_1010036 quarter based unit UO_0000002
UO_1010037 hundredweight based unit UO_0000002
UO_1010038 ton based unit UO_0000002
UO_1010039 slug based unit UO_0000111
UO_1010040 teaspoon based unit UO_0000095
UO_1010049 gram per square meter based unit UO_0000054
UO_1010051 large calorie based unit UO_0000111
UO_1010060 gray per minute based unit UO_0000129
UO_01200005 decisiemens per metre UO_1000264
UO_01200025 cubic meters per hectare UO_1000096
HDB_UO:000001 megajoules per square metre UO_1000112
HDB_UO:000002 microgram per gram microgram per gram unit
HDBUO_0000001 milligram per 100 grams concentration expresed as mg/100g