/ Dictionary / Index R retinitis: Meaning and Definition of Find definitions for: ret•i•ni•tis Pronunciation: (ret"n-ī'tis), [key] — n. Ophthalmol. inflammation of the retina. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: retinitis (Thesaurus) retinite retinitis pigmentosa Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language