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atomic mass unit

 

Definitions from WordNet

Noun atomic mass unit has 1 sense
  1. atomic mass unit - unit of mass for expressing masses of atoms or molecules
    --1 is a kind of
    mass unit

Definitions from the Web

Term: Atomic Mass Unit

Description:

An atomic mass unit (AMU) is a unit used to express the relative mass of atoms and molecules. It stands for one-twelfth the mass of a carbon-12 atom, which is approximately 1.6605 × 10^-27 kilograms.

Senses:

Sense 1:

Noun: The standard unit for measuring the masses of atoms and molecules.

Example Sentence: The atomic mass unit of hydrogen is approximately 1 AMU.

Sense 2:

Noun: A unit of mass equal to one-sixteenth the mass of an oxygen-16 atom.

Example Sentence: The atomic mass unit of carbon-12 is defined as exactly 12 AMU.

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