mass unit

Thesaurus

Noun

1.

mass unit - a unit of measurement for mass       unit, unit of measurement - 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 slug - a unit of mass equal to the mass that accelerates at 1 foot/sec/sec when acted upon by a force of 1 pound; approximately 14.5939 kilograms