Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “atomic mass”

atomic mass

noun [C or U]     specialized
the mass of a specific isotope of a particular chemical element, usually expressed in atomic mass units → Compare relative atomic massMeasurements of weight and mass
(Definition of atomic mass noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of atomic mass

Definitions of “atomic mass” in other dictionaries

Translations of “atomic mass”

Word of the Day

pump iron

to lift heavy weights for exercise

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More