antiproton Hear it!

antiproton definition

anti·pro·ton (an′tī prō′tän′; -tē-, -ti-)

noun

the antiparticle of the proton, with the same mass as the proton but a negative charge

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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