Meaning of “atomic mass unit” in the English Dictionary

american-english dictionary

"atomic mass unit" in British English

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atomic mass unitnoun [ C ]

uk /əˌtɒm.ɪk ˈmæs ˌjuː.nɪt/ us /əˌtɑː.mɪk ˈmæs ˌjuː.nɪt/ abbreviation u specialized

a unit used for measuring atomic mass, equal to one twelfth of the mass of an atom of carbon in its commonest form, carbon-12

(Definition of “atomic mass unit” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"atomic mass unit" in American English

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atomic mass unitnoun [ C ]

us /əˈtɑm·ɪk ˈmæs ˌju·nɪt/

chemistry, physics one-twelfth the mass of one atom of carbon

(Definition of “atomic mass unit” from the Cambridge Academic Content Dictionary © Cambridge University Press)