u.m.a. — meaning in English
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English meaning
- atomic mass unit noun A standard unit for stating the masses of atoms and molecules, defined as exactly one twelfth of the mass of a single carbon-12 atom, which is about 1.66 x 10^-27 kilograms. It is symbolised u or amu and is also called the dalton.
Senses
u.m.a. is used for these senses in English:
- atomic mass unit (physical chemistry) A unit of mass equal to 1/12 the mass of an atom of 12C (carbon-12, an isotope of carbon).
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