atomic mass unit

atomic mass unit

n. Abbr. amu

A unit of mass equal to ¹/₁₂ the mass of the most abundant isotope of carbon, carbon-12, which is assigned a mass of 12. Also called dalton.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

atomic mass unit

n

(Units) a unit of mass used to express atomic and molecular weights that is equal to one twelfth of the mass of an atom of carbon-12. It is equivalent to 1.66 × 10^–27 kg. Abbreviation: amu Also called: unified atomic mass unit or dalton

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

atom′ic mass′ u′nit

n.

a unit of mass, equal to 1/12 the mass of the carbon-12 atom and used to express the mass of atomic and subatomic particles.

Also called dalton.

[1950–55]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

atomic mass unit

A unit of mass equal to ¹/₁₂ the mass of an atom of the most common isotope of carbon (carbon 12), which is assigned a mass of 12. A hydrogen atom has a mass of 1 atomic mass unit since its mass is ¹/₁₂ the mass of carbon 12.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

atomic mass unit

(amu)

Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited

Thesaurus

Noun

1.

atomic mass unit - unit of mass for expressing masses of atoms or molecules mass unit - a unit of measurement for mass

Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

Translations

unidade de massa atômica