Atomic Mass Definition
noun
The mass of an atom, usually expressed in atomic mass units.
American Heritage
The mass of a given atom, usually expressed in atomic mass units: it is the atomic weight multiplied by the atomic mass unit.
Webster's New World
The mass of an atom.
Wiktionary
(proscribed) Atomic weight; the average mass of atoms of an element.
Wiktionary
Synonyms:
Other Word Forms of Atomic Mass
Noun
Singular:
atomic mass
Plural:
atomic-masses
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