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Dictionary

par•ton

Pronunciation: (pär'ton), [key]
—n. Physics.
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.

part of speech

partook

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