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unified atomic mass unit. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Noun
unified atomic mass unit (plural unified atomic mass units)
- (chemistry) A unit of mass equal to 1/12 the mass of an atom of the 12C isotope of carbon.
- Synonyms: dalton, atomic mass unit
Usage notes
- Nowadays often used interchangeably with atomic mass unit, but there was historically a difference (see Wikipedia).