# Generated from udunits2-accepted.xml


# period of time equal to 60 seconds
minute = 60 * s = min = minutes

# period of time equal to 60 minutes
hour = 60 * min = h = hours = hr

# period of time equal to 24 hours
day = 24 * h = d = days

# mathematical constant equal to the ratio of a circle's circumference
# to its diameter
# [comment] This "unit" is useful in the definition of subsequent
# units.
# [comment @ π] GREEK SMALL LETTER PI
pi = 3.141592653589793238462643383279 = π

# measurement of a plane angle representing 1/360 of a full rotation
# [comment @ °] DEGREE SIGN
arc_degree = (pi / 180) * rad = ° = arc_degrees = angular_degree = angular_degrees = degree = degrees = arcdeg = arcdegs

# measurement of a plane angle equal to 1/60 arc degree
arc_minute = ° / 60 = ' = arc_minutes = angular_minute = angular_minutes = arcminute = arcminutes = arcmin = arcmins

# measurement of a plane angle equal to 1/60 arc minute
arc_second = arc_minute / 60 = " = arc_seconds = angular_second = angular_seconds = arcsecond = arcseconds = arcsec = arcsecs

# unit of capacity equal to 1000 cubic centimeters
# [comment] The definition is exact.  From 1901 to 1964, however, 1
# liter was 1.000028 dm^3 (volume of 1 kg of water under standard
# conditions).
# [comment @ L] NIST recommendation
liter = dm ** 3 = L = liters = litre = litres = l

# unit of weight equal to 1000 kilograms
metric_ton = 1000 * kg = t = metric_tons = tonne = tonnes

# unit of energy equal to the work accelerating an electron through a
# potential difference of one volt
# [comment] Unit's value is obtained experimentally
electronvolt = 1.60217733e-19 * J = eV = electronvolts = electron_volt = electron_volts

# standard unit for indicating mass on an atomic or molecular scale;
# is approximately the mass of one nucleon (either a single proton or
# neutron), and equivalent to 1 g/mol
# [comment] Unit's value is obtained experimentally
unified_atomic_mass_unit = 1.6605402e-27 * kg = u = unified_atomic_mass_units = atomic_mass_unit = atomic_mass_units = atomicmassunit = atomicmassunits = amu

# Exact definition according to 2012 resolution by the International
# Astronomical Union (IAU). Ostensibly equal to the mean distance from
# the center of the earth to the center of the sun.
# [comment] According to resolution by the International Astronomical
# Union (IAU) in 2012
astronomical_unit = 1.49597870700e11 * m = au = astronomical_units

# unit of measurement equal to 149.6 million kilometers, the mean
# distance from the center of the earth to the center of the sun
# according to the International Bureau of Weights and Measures (BIPM)
# in 2006
# [comment] Pre-2012 resolution by the IAU
astronomical_unit_BIPM_2006 = 1.495979e11 * m = ua = astronomical_unit_BIPM_2006s

# unit of distance at sea, set at 1852 meters (approximately one
# minute of arc measured along any meridian)
# [comment] Unit is temporarily accepted for use with the SI.
nautical_mile = 1852 * m = _ = nautical_miles

# derived unit of speed at sea
# [comment] Unit is temporarily accepted for use with the SI.
international_knot = nautical_mile / hour = _ = international_knots = knot_international = knot_internationals = knot = knots

# unit of length equal to one hundred-millionth of a centimeter (1
# meter/10**10)
# [comment] Unit is temporarily accepted for use with the SI.
# [comment @ Å] LATIN CAPITAL LETTER A WITH RING ABOVE
# [comment @ Å] ANGSTROM SIGN
angstrom = 1e-10 * m = Å = angstroms = ångström = ångströms = Å

# unit of area equal to 100 square meters
# [comment] Unit is temporarily accepted for use with the SI.
are = dam ** 2 = a = ares

# unit of area equal to 100 are ('hectoare'), or 10000 square meters
# [comment] Unit is temporarily accepted for use with the SI.
hectare = 100 * are = _ = hectares

# unit of area, approximately the cross-sectional area of a uranium
# nucleus (10e-28 square meters)
# [comment] Unit is temporarily accepted for use with the SI.
barn = 100 * fm ** 2 = b = barns

# unit of pressure equal to 100000 Pascals, or about 0.987 atmospheres
# of pressure
# [comment] Unit is temporarily accepted for use with the SI.
bar = 1000 * hPa = _ = bars

# unit of acceleration equal to 1 cm per second squared
# [comment] Unit is temporarily accepted for use with the SI.
gal = cm / s ** 2 = _ = gals

# unit of radioactivity corresponding to 3.7 * 10e10 disintegrations
# per second
# [comment] Unit is temporarily accepted for use with the SI.
curie = 3.7e10 * Bq = Ci = curies

# unit of ionizing radiation, the amount producing one electrostatic
# unit of positive or negative ionic charge in one cubic centimeter of
# air under standard conditions; rarely used
# [comment] Unit is temporarily accepted for use with the SI.
roentgen = 2.58e-4 * C / kg = R = roentgens

# unit of radiation dosage applied to humans; equal to one hundredth
# of a sievert
# [comment] Unit is temporarily accepted for use with the SI.
rem = cSv = _ = rems
