/ Dictionary / Index T tritanopia: Meaning and Definition of Find definitions for: trit•an•o•pi•a Pronunciation: (tr?t"n-?'p?-u), [key] ? n. Ophthalm. a defect of vision in which the retina fails to respond to blue and yellow. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. See also: tritanopia (Thesaurus) tritagonist trite Related Content Daily Word Quiz: wizened Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language