atomic mass unit

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noun Physics.

Also called dalton . a unit of mass, equal to 1/12 (0.0833) the mass of the carbon-12 atom and used to express the mass of atomic and subatomic particles.

(formerly) a unit of mass, equal to 1/16 (0.0625) the mass of an oxygen atom having atomic mass 16. Abbreviations: amu, AMU

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Origin of atomic mass unit

First recorded in 1950–55

Words nearby atomic mass unit

atomic force microscope, atomic heat, atomic hydrogen, atomicity, atomic mass, atomic mass unit, atomic number, atomic pile, atomic power, atomics, atomic spectrum

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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Their bodies were later found incinerated and buried in mass graves outside of town.
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“Stay in formation,” a sergeant from the ceremonial unit said over a public address system to the cops along the street.
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Charred beams and blackened walls showed stark and gaunt in the glow of a smoldering mass of wreckage.
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British Dictionary definitions for atomic mass unit

atomic mass unit

noun

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 kgAbbreviation: amu Also called: unified atomic mass unit, dalton

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

Medical definitions for atomic mass unit

atomic mass unit

n.

A unit of mass equal to 112 the mass of an atom of carbon 12, which is assigned a mass of 12.dalton

Scientific definitions for atomic mass unit

atomic mass unit

A unit of mass equal to 112 the mass of an atom of the most common isotope of carbon (carbon 12), which is assigned a mass of 12 and has a value of 1.660 X 10-24 grams. A hydrogen atom has a mass of 1 atomic mass unit since its mass is 112 the mass of carbon 12. Also called dalton

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atomic mass unit

noun Physics.

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Origin of atomic mass unit

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Example sentences from the Web for atomic mass unit

British Dictionary definitions for atomic mass unit

noun

Medical definitions for atomic mass unit

n.

Scientific definitions for atomic mass unit