positron Hear it!

positron definition

☆ posi·tron (päz′i trän′)

noun

Particle Physics a positively charged lepton with the same mass and magnitude of charge as the electron; the antiparticle of an electron

Etymology: posi(tive) + (elec)tron

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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