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Meaning of graviton

grav•i•ton

Pronunciation: (grav'i-ton"), [key]
— n. Physics.
  1. the theoretical quantum of gravitation, usually assumed to be an elementary particle that is its own antiparticle and that has zero rest mass and charge and a spin of two. Cf. photon.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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