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amu

American

Or AMU

abbreviation

atomic mass unit.

AMU ¹ British

abbreviation

Associated Metalworkers Union

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

amu ² British

abbreviation

atomic mass unit

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu, and 8.82% abundance with 21.99 amu.

From Textbooks • Feb. 14, 2019

The mass of the atom is 22.9898 amu.

From Textbooks • Feb. 14, 2019

However, mass spectrometric measurements reveal that the mass of an atom is 4.0026 amu, less than the combined masses of its six constituent subatomic particles.

From Textbooks • Feb. 14, 2019

The principal component of mothballs is naphthalene, a compound with a molecular mass of about 130 amu, containing only carbon and hydrogen.

From Textbooks • Feb. 14, 2019

Ex. amu = love! ni amu = let us love.

From International Language Past, Present and Future: With Specimens of Esperanto and Grammar by Clark, Walter John

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023