/ Dictionary / Index A antibaryon: Meaning and Definition of Find definitions for: an•ti•bar•y•on Pronunciation: (an"tē-bar'ē-on", an"tī-), [key] — n. Physics. the antiparticle of a baryon, having baryon number −1 and charge, strangeness, and other quantum numbers opposite in sign to those of the baryon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: antibaryon (Thesaurus) Antiballistic Missile Treaty Antibes Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language