Meaning of positron

pos•i•tron

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