Atomic mass unit
also called dalton. a unit of m-ss, equal to 1/12 (0.0833) the m-ss of the carbon-12 atom and used to express the m-ss of atomic and subatomic particles.
(formerly) a unit of m-ss, equal to 1/16 (0.0625) the m-ss of an oxygen atom having atomic m-ss 16.
abbreviation: amu, amu.
noun
a unit of m-ss used to express atomic and molecular weights that is equal to one twelfth of the m-ss of an atom of carbon-12. it is equivalent to 1.66 × 10–27 kg amu also called unified atomic m-ss unit, dalton
atomic m-ss unit n.
abbr. amu
a unit of m-ss equal to 1/12 the m-ss of an atom of carbon 12, which is -ssigned a m-ss of 12. also called dalton.
atomic m-ss unit
a unit of m-ss equal to 1/12 the m-ss of an atom of the most common isotope of carbon (carbon 12), which is -ssigned a m-ss of 12 and has a value of 1.660 × 10-24 grams. a hydrogen atom has a m-ss of 1 atomic m-ss unit since its m-ss is 1/12 the m-ss of carbon 12. also called dalton.
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