unified atomic mass unit

From Wiktionary, the free dictionary
Jump to navigation Jump to search

English

[edit]

Noun

[edit]

unified atomic mass unit (plural unified atomic mass units)

  1. (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

[edit]
  • Nowadays often used interchangeably with atomic mass unit, but there was historically a difference (see Wikipedia).