/ Dictionary / Index T triton: Meaning and Definition of Find definitions for: tri•ton Pronunciation: (trī'ton), [key] — n. Physics. a positively-charged particle consisting of a proton and two neutrons, equivalent to the nucleus of an atom of tritium. Cf. Tri•ton Pronunciation: (trīt'n), [key] — n. a son of Poseidon and Amphitrite, represented as having the head and trunk of a man and the tail of a fish, and as using a conch-shell trumpet. a moon of Neptune. (l.c.) any of various marine gastropods of the family Cymatiidae, having a large, spiral, often beautifully colored shell. (l.c.) the shell of a triton. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: triton (Thesaurus) tritoma tritone Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language