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Definition of antimatter

antimatter

/ˈæn.tiˌmæt.ɚ/
an · ti · mat · ter
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antimatter Lexical Profile

antimatter Game Scores & Validity

• noun

1

A form of physical substance composed of antiparticles, which have the same mass as particles of ordinary matter but opposite electrical charges and quantum properties, annihilating into pure energy upon contact with ordinary matter.

Example

"Physicists use powerful magnetic traps to contain tiny amounts of antimatter in a vacuum so it does not touch the walls of the chamber."

Antonyms
View all antonyms for antimatter

• Nearby Words

antimalaria
antimarijuana
antimask
antimatter
antimilitary
antimissile
antimonarchist

Word Origin & Etymology

Coined in 1898 by the British physicist Arthur Schuster in a whimsical letter to the journal Nature, before being adopted into modern particle physics in the 1950s following Paul Dirac's prediction of the positron.

Cite this Entry

Wordmom. (2026). Definition of Antimatter. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/antimatter
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