Dictionary
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.