/ Dictionary / Index I iodopsin: Meaning and Definition of Find definitions for: i•o•dop•sin Pronunciation: (ī"u-dop'sin), [key] — n. Biochem. a photosensitive violet pigment that occurs in the cones of the retina and is transformed by light into retinal and an opsin protein. Cf. rhodopsin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: iodopsin (Thesaurus) iodophor iodous Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language