/ Dictionary / Index G gluon: Meaning and Definition of Find definitions for: glu•on Pronunciation: (gl'on), [key] — n. Physics. an unobserved massless particle with spin 1 that is believed to transmit the strong force between quarks, binding them together into baryons and mesons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gluon (Thesaurus) glume gluonium Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language