/ Dictionary / Index B baryon number: Meaning and Definition of Find definitions for: bar'yon num"ber Pronunciation: [key] — Physics. Physics. a quantum number assigned to elementary particles, baryons having baryon number 1, antibaryons −1, and all other observable particles 0; quarks have baryon number 1/3 and antiquarks −1/3. Cf. conservation of baryon number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. baryon Baryshnikov Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language