#mass  the property of a body that causes it to have weight in a gravitational field
  supertype:  #fundamental_quantity  #physical_property
  subtype:  #biomass__biomas  the total mass of living matter in a given unit area
  subtype:  #rest_mass  (physics) the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body
  subtype:  #relativistic_mass  (physics) the mass of a body in motion relative to the observer: it is equal to the rest mass multiplied by a factor that is greater than 1 and that increases as the magnitude of the velocity increases
  subtype:  #bulk  the property possessed by a large mass
  subtype:  #gravitational_mass  (physics) the mass of a body as measured by its gravitational attraction for other bodies
  subtype:  #inertial_mass  (physics) the mass of a body as determined by the second law of motion from the acceleration of the body when it is subjected to a force that is not due to gravity
  subtype:  #atomic_mass  (chemistry) the mass (in atomic mass units) of an isotope of an element
  subtype:  #atomic_weight__relative_atomic_mass  (chemistry) the ratio of the atomic mass of an element to half the atomic mass of carbon-12
     subtype:  #equivalent_weight__equivalent__combining_weight__combiningweight__eq  the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen
     subtype:  #milliequivalent  one-thousandth of an equivalent
  subtype:  #molecular_weight__molecularweight__relative_molecular_mass  (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule
  subtype:  #mass_defect__mass_deficiency  the amount by which the mass of an atomic nucleus is less than the sum of the masses of its constituent particles
  subtype:  #mass_unit  a unit of measurement for mass
     subtype:  #atomic_mass_unit  unit of mass for expressing masses of atoms or molecules
     subtype:  #mass_number__nucleon_number__nucleonnumber  the sum of the number of neutrons and protons in an atomic nucleus
     subtype:  #avoirdupois_unit__avoirdupoisunit  any of the units of the avoirdupois system of weights
        subtype:  #grain.avoirdupois_unit  1/7000 pound; equals a troy grain or 64.799 milligrams
        subtype:  #dram  1/16 ounce or 1.771 grams
        subtype:  #ounce  a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams
        subtype:  #lb__pound  16 ounces; "he tried to lift 100 pounds"
        subtype:  #stone.avoirdupois_unit  (British) an avoirdupois unit used to measure the weight of a human body; equal to 14 pounds
        subtype:  #quarter.avoirdupois_unit  $('p' #lb removed since already part of stone.avoirdupois_unit)$ a quarter of a hundredweight (25 pounds)
        subtype:  #long_hundredweight__hundredweight__cwt  a British unit of weight equivalent to 112 pounds
        subtype:  #short_hundredweight__shorthundredweight__hundredweight__cwt__centner__quintal  a United States unit of weight equivalent to 100 pounds
        subtype:  #long_ton__ton__gross_ton__grosston  a British unit of weight equivalent to 2240 pounds
        subtype:  #short_ton__shortton__ton__net_ton__netton  a United States unit of weight equivalent to 2000 pounds
        subtype:  #kiloton.avoirdupois_unit  one thousand tons
        subtype:  #megaton.avoirdupois_unit  one million tons
     subtype:  #metric_weight_unit__weight_unit  a decimal unit of weight based on the gram
        subtype:  #microgram__mcg  one millionth of a gram
        subtype:  #milligram__mg  1/1000 gram
        subtype:  #metric_grain__grain  used for pearls or diamonds: 50 mg or 1/4 carat
        subtype:  #decigram__dg  1/10 gram
        subtype:  #carat  a unit of weight for precious stones = 200 mg
        subtype:  #gram__gramme__gm__g  a metric unit of weight equal to one thousandth of a kilogram
        subtype:  #gram_atom__gram-atomic_weight  the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element
        subtype:  #gram_molecule__mole__mol  the molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the System International d'Unites
        subtype:  #dekagram__decagram__dkg__dag  10 grams
        subtype:  #hectogram__hg  100 grams
        subtype:  #kilogram__kg__kilo__key  one thousand grams; the basic unit of mass adopted under the System International d'Unites; "a kilogram is approximately 2.2 pounds"; "they were carrying two keys of heroin"
        subtype:  #myriagram__myg  one ten thousandth of a centner
        subtype:  #centner  in some European countries: a unit of weight equivalent to 50 kilograms
        subtype:  #metric_hundredweight__hundredweight__doppelzentner__centner  a unit of weight equal to 100 kilograms
        subtype:  #quintal  a unit of weight equal to 100 kilograms
        subtype:  #metric_ton__MT__tonne__t  a unit of weight equivalent to 1000 kilograms

3 statements are about indirect instances of #mass: pm#graph1_on_animal, pm#graph1_on_spamOnly@phmartin.info, dg#graph1_on_daniel.goodburn@dsto.defence.gov.au
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