antiatom

American

[an-tee-at-uhm, an-tahy-] / ˈæn tiˌæt əm, ˈæn taɪ- /

noun

Physics.

an atom of antimatter.

antiatom Scientific

/ ăn′tē-ăt′əm,ăn′tī- /

An atom composed of antiparticles. An antiatom consists of positrons, antiprotons, and antineutrons. It has the same mass and spin as an ordinary atom, and the same amount of charge and magnetic moment, but the charge and magnetic moment are the opposite of those of an ordinary atom.

Etymology

Origin of antiatom

First recorded in 1965–70; anti- + atom

Example Sentences

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See Examples For:

antiatom

An antiatom, for example, composed of positrons, antiprotons, and antineutrons should have the same atomic spectrum as its matter counterpart.

From Textbooks ● Aug. 12, 2015

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