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grav•i•ton



Pronunciation: (grav'i-ton"), [key]
n. Physics.
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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