This is a module of OM, with mostly just elements that are relevant to stuff. Made by Maria Keet
Ontology of units of Measure (OM)
The Ontology of units of Measure and related concepts (OM) models concepts and relations important to scientific research. It has a strong focus on units and quantities, measurements, and dimensions.
Hajo Rijgersberg, Mark van Assem, Don Willems, Mari Wigham, Jeen Broekstra, Jan Top
OMLaTeX command that can be used to render this quantity or unit.
LaTeX command
typeset by LaTeX command
OMLaTeX formatted symbol may include commands such as \unit and \E as defined in OMLaTeX.
LaTeX symbol
LaTeX formatted symbol
has LaTeX symbol
abbreviation
has abbreviation
An alternative OMLaTeX formatted symbol, which may include commands such as \unit and \E as defined in OMLaTeX.
alternative LaTeX symbol
alternative LaTeX formatted symbol
has alternative LaTeX symbol
alternative label
alternative symbol
has alternative symbol
definition description
has definition description
external link
has external link
longcomment
has longcomment
long comment
symbol
has symbol
Used to specify abbreviations that are used in e.g. every day speech but are not defined in any standard.
unofficial abbreviation
has unofficial abbreviation
Used to specify labels that are used in e.g. every day speech but are not defined in any standard.
unofficial label
has unofficial label
reference
base
has base
base quantity
has base quantity
base unit
has base unit
definition
has definition
definition relative to
has definition relative to
denominator
has denominator
derived quantity
has derived quantity
derived unit
has derived unit
dimension
has dimension
element
has element
measurement scale
has measurement scale
numerator
has numerator
phenomenon
has phenomenon
prefix
has prefix
quantity
has quantity
singular unit
has singular unit
term 1
has term 1
term 2
has term 2
For quantity classes this property indicates a commonly-used unit.
unit of measure
has unit of measure
unit of measure or measurement scale
has unit of measure or measurement scale
uses application area
value
vectorial or tensorial character
has vectorial or tensorial character
zero element
has zero element
SI amount of substance dimension exponent
has SI amount of substance dimension exponent
SI electric current dimension exponent
has SI electric current dimension exponent
SI length dimension exponent
has SI length dimension exponent
SI luminous intensity dimension exponent
has SI luminous intensity dimension exponent
SI mass dimension exponent
has SI mass dimension exponent
SI thermodynamic temperature dimension exponent
has SI thermodynamic temperature dimension exponent
SI time dimension exponent
has SI time dimension exponent
definition factor
has definition factor
definition off-set
has definition off-set
exponent
has exponent
factor
has factor
numerical value
has numerical value
rank
has rank
Absorbed dose is the energy deposited in a medium by ionizing radiation. It is a derived quantity in the International System of Units. Absorbed dose is energy divided by mass.
absorbed dose
total ionizing dose
amount of money
amount of substance fraction
amount-of-substance fraction
mole fraction
molfractie
amount of substance ratio
amount-of-substance ratio
molar ratio of solution
mole ratio
atomic mass constant
unified atomic mass constant
binary prefix
cardinal scale
cell density
compound unit
Dimensions are abstract properties of units and quantities neglecting their vectorial or tensorial character and all numerical factors including their sign.
effective mass
fixed point
fixed zero point
interval scale
A measure combines a number to a unit of measure or an interval or ratio scale. For example, "3 m" is a measure.
measure
Measurement scales are concepts used for the expression of quantities. Four types of measurement scales are: nominal scales, ordinal scales, interval scales and ratio scales. The latter two scales are also called cardinal scales. An example of a scale is the Celsius scale, a temperature scale.
scale
A measurement scale category is an element of a nominal or ordinal scale, for example, the category number 10 of the Beaufort scale, indicating storm.
measurement scale category
molaire massa
molar mass
molair volume
molar volume
nominal scale
nuclear mass
ordered measurement scale category
ordinal scale
A phenomenon is the qualitative object (e.g., food, star, molecule) that has quantifiable (standardised) aspects (e.g, length, mass, time).
A point is an element of an interval scale or a ratio scale, for example, 273.16 on the Kelvin scale indicates the triple point of water thermodynamic temperature.
point
A prefix is a name that precedes a basic unit of measure to indicate a decimal multiple or fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol. For example, an electric current of 0.000 000 001 ampere is written by using the SI-prefix nano as 1 nanoampere or 1 nA.
A quantity is a representation of a quantifiable (standardised) aspect (such as length, mass, and time) of a phenomenon (e.g., a star, food, or a molecule). Quantities are classified according to similarity in (implicit) metrological aspect, e.g. the length of my speedboat and the length of my racing car are classified as length.
ratio scale
SI prefix
In order to achieve a coherent, interdependent set of units of measure in the wide variety of units that exist, units are organised in systems of units. A system of units is based on a set of units chosen by convention to be the system’s base units, units that are considered to be mutually independent (i.e., can’t be expressed in terms of each other).
system of units
The total density parameter.
total density parameter
unit division
unit exponentiation
unit multiple or submultiple
unit multiplication
A unit of measure is a definite magnitude of a quantity, defined and adopted by convention and/or by law. It is used as a standard for measurement of the same quantity, where any other value of the quantity can be expressed as a simple multiple of the unit of measure. For example, length is a quantity; the metre is a unit of length that represents a definite predetermined length. When we say 10 metre (or 10 m), we actually mean 10 times the definite predetermined length called "metre".
unit
unit of measurement
A quantity has vectorial or tensorial character: scalar, vector, matrix or tensor.
volume fraction
volumefractie
concentration (v/v)
volume in γ phase space
British system of units
Britse systeem van eenheden
foot-pound-second system of units
Gaussian system of units
Gaussische eenhedenstelsel
Gaussian CGS system of units
mixed CGS system of units
symmetrised CGS system of units
International System of Units
Internationale Stelsel van Eenheden
International Unit
absorbed dose rate dimension
amount of substance dimension
stofhoeveelheiddimensie
amount of substance concentration dimension
The US barrel is a unit of volume defined as 1.589873e-1 cubic metre.
barrel (US)
US barrel
The bit is a unit of information capacity defined as the information capacity of one binary digit.
bit
位元
The byte is a unit of information capacity defined as 8 bit.
byte
字节
The 15 °C calorie is a unit of energy defined as 4.18580 joule.
calorie (15 °C)
15 °C calorie
The 20 °C calorie is a unit of energy defined as 4.18190 joule.
calorie (20 °C)
20 °C calorie
The International Table calorie is a unit of energy defined as 4.1868 joule.
calorie (International Table)
International Steam Table calorie
International Table calorie
calorie (International Steam Table)
The mean calorie is a unit of energy defined as 4.19002 joule.
calorie (mean)
mean calorie
The thermochemical calorie is a unit of energy defined as 4.184 joule.
calorie (thermochemical)
thermochemical calorie
The US dry gallon is a unit of volume defined as 4.40488377086e-3 cubic metre.
dry gallon (US)
US dry gallon
gallon (US dry)
The US dry pint is a unit of volume defined as 5.506105e-4 cubic metre.
dry pint (US)
US dry pint
pint (US dry)
The US dry quart is a unit of volume defined as 1.101221e-3 cubic metre.
dry quart (US)
US dry quart
quart (US dry)
The Imperial gallon is a unit of volume defined as 4.54609e-3 cubic metre.
gallon (Imperial)
Imperial gallon
The US gallon is a unit of volume defined as 3.785412e-3 cubic metre.
gallon (US)
US gallon
The gamma is a unit of magnetic flux density defined as 1.0e-9 tesla.
gamma
The Imperial gill is a unit of volume defined as 1.420653e-4 cubic metre.
gill (Imperial)
Imperial gill
The US gill is a unit of volume defined as 1.182941e-4 cubic metre.
gill (US)
US gill
The grain is a unit of mass defined as 6.479891e-5 kilogram.
grain
The gram is a unit of mass defined as 1.0e-3 kilogram.
gram
The joule is a unit of energy defined as kilogram times square metre divided by second squared.
joule
焦耳
The joule is a unit of energy defined as kilogram times square metre divided by second squared. The joule is a derived unit in the International System of Units.
The US liquid pint is a unit of volume defined as 4.731765e-4 cubic metre.
liquid pint (US)
US liquid pint
pint (US liquid)
The US liquid quart is a unit of volume defined as 9.463529e-4 cubic metre.
liquid quart (US)
US liquid quart
quart (US liquid)
The litre is a unit of volume defined as 1.0e-3 cubic metre.
liter
litre
公升
The lumen is a unit of luminous flux defined as candela times steradian = lux times square metre.
lumen
The lumen is a unit of luminous flux defined as candela times steradian = lux times square metre. The lumen is a derived unit in the International System of Units.
The lux is a unit of illuminance defined as lumen divided by square metre = candela times steradian divided by square metre.
lux
The lux is a unit of illuminance defined as lumen divided by square metre = candela times steradian divided by square metre. The lux is a derived unit in the International System of Units.
mass dimension
massadimensie
mass of the international prototype of the kilogram
Molair is a unit of amount of substance concentration defined as 1 mole per litre.
molair
The mole is a unit of amount of substance defined as the amount of substance of a system that contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12.
mol
mole
The mole is a unit of amount of substance defined as the amount of substance of a system that contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12. The mole is a base unit in the International System of Units.
Mole per cubic metre is a unit of amount of substance concentration defined as mole divided by cubic metre.
mol per kubieke meter
mole per cubic metre
Mole per cubic metre is a unit of amount of substance concentration defined as mole divided by cubic metre. Mole per cubic metre is a derived unit in the International System of Units.
Mole per litre is a unit of amount of substance concentration defined as mole divided by litre.
mole per liter
mole per litre
Mole per litre is a unit of amount of substance concentration defined as mole divided by litre. Mole per litre is a derived unit in the International System of Units.
The ohm is a unit of electrical resistance defined as volt divided by ampere = square metre times kilogram divided by second to the power 3 times ampere squared.
ohm
The ohm is a unit of electrical resistance defined as volt divided by ampere = square metre times kilogram divided by second to the power 3 times ampere squared. The ohm is a derived unit in the International System of Units.
one binary digit
The apothecaries' ounce is a unit of mass defined as 3.110348e-2 kilogram.
ounce (apothecaries')
apothecaries' ounce
ounce (troy)
troy ounce
The avoirdupois ounce is a unit of mass defined as 2.834952e-2 kilogram.
ounce (avoirdupois)
avoirdupois ounce
The US peck is a unit of volume defined as 8.809768e-3 cubic metre.
peck (US)
US peck
The pint is a unit of volume defined as 568.26125 millilitre.
pint (Imperial)
Imperial pint
The apothecaries' pound is a unit of mass defined as 3.732417e-1 kilogram.
pound (apthecaries')
apothecaries' pound
pound (troy)
troy pound
The avoirdupois pound is a unit of mass defined as 4.535924e-1 kilogram.
pound (avoirdupois)
avoirdupois pound
The poundal is a unit of force defined as 1.382550e-1 newton.
poundal
The quad is a unit of energy defined as 1.0e15 British thermal unit (International Table).
quad
The Imperial quart is a unit of volume defined as 1.1365 litre.
quart (Imperial)
Imperial quart
The rem is a unit of dose equivalent defined as 1.0e-2 sievert.
rem
The rhe is a unit of fluidity defined as 10 reciprocal pascal second (time).
rhe
The US rod is a unit of length defined as 5.029210 metre.
rod (US)
US rod
perch
pole
The shake is a unit of time defined as 1.0e-8 second.
shake
The shannon is a unit of information capacity defined as 1 bit.
shannon
The siemens is a unit of electrical conductance defined as 1 divided by ohm = ampere divided by volt = coulomb squared times second divided by kilogram times square metre = ampere squared times second to the power 3 divided by kilogram times square metre.
siemens
The siemens is a unit of electrical conductance defined as 1 divided by ohm = ampere divided by volt = coulomb squared times second divided by kilogram times square metre = ampere squared times second to the power 3 divided by kilogram times square metre. The siemens is a derived unit in the International System of Units.
The sievert is a unit of dose equivalent defined as joule divided by kilogram = square metre divided by second squared.
sievert
The sievert is a unit of dose equivalent defined as joule divided by kilogram = square metre divided by second squared. The sievert is a derived unit is the International System of Units.
The slug is a unit of mass defined as 1.459390e1 kilogram.
slug
斯勒格
Solar mass is a unit used in astronomy to denote stellar or galactic masses (http://en.wikipedia.org/wiki/Solar_mass).
solar mass
zonsmassa
The stere is a unit of volume defined as cubic metre.
stere
The stilb is a unit of luminance defined as 1.0e4 candela per square metre.
stilb
The stokes is a unit of kinematic viscosity defined as 1.0e-4 square metre per second (time).
stokes
The US tablespoon is a unit of volume defined as 1.478676e-5 cubic metre.
tablespoon (US)
US tablespoon
The US teaspoon is a unit of volume defined as 4.928922e-6 cubic metre.
teaspoon (US)
US teaspoon
The tesla is a unit of magnetic flux density defined as volt times second divided by square metre = newton divided by ampere times metre = weber divided by square metre = kilogram divided by coulomb times second = kilogram divided by ampere times second squared.
tesla
The tesla is a unit of magnetic flux density defined as volt times second divided by square metre = newton divided by ampere times metre = weber divided by square metre = kilogram divided by coulomb times second = kilogram divided by ampere times second squared. The tesla is a derived unit in the International System of Units.
The EC therm is a unit of energy defined as 1.05506e8 joule.
therm (EC)
EC therm
The US therm is a unit of energy defined as 1.054804e8 joule.
therm (US)
US therm
The short ton-force is a unit of force defined as 8.896443e3 newton.
ton-force (short)
short ton-force
The long ton is a unit of mass defined as 1.016047e3 kilogram.
ton (long)
long ton
The register ton is a unit of volume defined as 2.831658 cubic metre.
ton (register)
register ton
The short ton is a unit of mass defined as 9.071847e2 kilogram.
ton (short)
short ton
The short assay ton is a unit of mass defined as 2.916667e-2 kilogram.
ton (short assay)
short assay ton
The ton of TNT is a unit of energy defined as 4.184e9 joule.
ton of TNT
The ton of refrigeration is a unit of power defined as 3.516853e3 watt.
ton of refrigeration
The tonne is a unit of mass defined as 1000 kilogram.
ton
tonne
公噸
metric ton
The torr is a unit of pressure defined as 1.333224e2 pascal.
torr
The unified atomic mass unit is a unit of mass defined as 1.660538782(83)e-27 kilogram.
unified atomic mass unit
The volt is a unit of electric potential defined as watt divided by ampere = joule divided by coulomb = newton times metre divided by ampere times second = kilogram times square metre divided by ampere times second to the power 3.
volt
The volt is a unit of electric potential defined as watt divided by ampere = joule divided by coulomb = newton times metre divided by ampere times second = kilogram times square metre divided by ampere times second to the power 3. The volt is a derived unit in the International System of Units.
volume dimension
volumedimensie
The watt is a unit of power defined as joule divided by second = newton times metre divided by second = volt times ampere = kilogram times square metre divided by second to the power 3.
watt
The watt is a unit of power defined as joule divided by second = newton times metre divided by second = volt times ampere = kilogram times square metre divided by second to the power 3. The watt is a derived unit in the International System of Units.
The weber is a unit of magnetic flux defined as kilogram times square metre divided by second squared times ampere = volt times second = joule divided by ampere.
weber
The weber is a unit of magnetic flux defined as kilogram times square metre divided by second squared times ampere = volt times second = joule divided by ampere. The weber is a derived unit in the International System of Units.
The year is a unit of time defined as 3.1536e7 second.
jaar
year
The sidereal year is a unit of time defined as 3.155815e7 second.
year (sidereal)
sidereal year
The tropical year is a unit of time defined as 3.155693e7 second.
year (tropical)
tropical year
Explanatory Supplement to the Astronomical Almanac
IAU Division I Working Group Numerical Standards
Amount of substance is the number of elementary entities such as atoms, molecules, electrons, particles, etc. present in a phenomenon. It is a base quantity in the International System of Units.
stofhoeveelheid
amount of substance
molar concentration
molaire concentratie
amount of substance concentration
atomic mass
body label mass
body mass
dry body mass
dry mass
label mass
质量
Mass is the amount of matter of a phenomenon. It is a base quantity in the International System of Units. Mass is force divided by acceleration.
massa
mass
neck ring mass
organ dose equivalent
gereduceerde massa
reduced mass
straw mass
top mass
volume
体积
inhoud
Volume is a measure of how much three-dimensional space any phenomenon occupies. It is a derived quantity in the International System of Units. Volume is length to the power 3.
constant current that produces an attractive force of 2e–7 newton per metre of length between two straight, parallel conductors of infinite length and negligible circular cross section placed one metre apart in a vacuum
length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second
luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540e12 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian