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Meaning of antiproton

an•ti•pro•ton

Pronunciation: (an'tē-prō"ton, an'tī-), [key]
— n. Physics.
  1. an elementary particle having negative charge equal in magnitude to that of the electron and having the same mass and spin as a proton; the antiparticle of the proton.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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