/ Dictionary / Index T tritanopia: Meaning and Definition of Find definitions for: trit•an•o•pi•a Pronunciation: (trīt"n-ō'pē-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: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language