parton: Meaning and Definition of

par•ton

Pronunciation: (pär'ton), [key]
— n. Physics.
  1. a constituent of the nucleon originally postulated in the theoretical analysis of high-energy scattering of electrons by nucleons and subsequently identified with quarks and gluons.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.