We found 1 definitions of mass unit from 1 different sources.
Noun |
||
mass unit - a unit of measurement for mass | ||
unit of measurement, unit any division of quantity accepted as a standard of measurement or exchange; "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume" | ||
atomic mass unit unit of mass for expressing masses of atoms or molecules | ||
mass number, nucleon number the sum of the number of neutrons and protons in an atomic nucleus | ||
avoirdupois unit any of the units of the avoirdupois system of weights | ||
metric weight unit, weight unit a decimal unit of weight based on the gram |