/ Dictionary / Index D deuteranopia: Meaning and Definition of Find definitions for: deu•ter•a•no•pia Pronunciation: (d"tur-u-nō'pē-u, dy"-), [key] — n. Ophthalm. a defect of vision in which the retina fails to respond to the color green. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: deuteranopia (Thesaurus) deuteragonist deuterate Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language