Antiproton Definition

ăntē-prōtŏn, ăntī-
antiprotons
noun
The antiparticle of the proton.
American Heritage
The antiparticle of the proton, with the same mass as the proton but a negative charge.
Webster's New World

(physics) The antiparticle of the proton, having a negative electric charge.

Wiktionary

Other Word Forms of Antiproton

Noun

Singular:
antiproton
Plural:
antiprotons

Origin of Antiproton

  • anti- +‎ proton

    From Wiktionary

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antiproton