Atomic Mass Unit Definition
noun
A unit of mass equal to112 the mass of the most abundant isotope of carbon, carbon-12, which is assigned a mass of 12.
American Heritage
A unit of mass, exactly one twelfth the mass of a neutral atom of the most abundant isotope of carbon, carbon-12: one atomic mass unit equals 1.6605 x 10-24 gram and is equivalent to 931.48 MeV in energy: symbol amu or u.
Webster's New World
Other Word Forms of Atomic Mass Unit
Noun
Singular:
atomic mass unit
Plural:
atomic-mass-units
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