a photosensitive, carotenoid protein pigment found in the rods of the retinas of freshwater vertebrates
Origin of porphyropsinfrom Classical Greek porphyra, purple + opsis, appearance ( from ?ps, eye) + -in
Any of a class of purple, light-sensitive pigments similar to rhodopsin, found in the retinal rods of the eyes of freshwater fishes and certain frogs.
Origin of porphyropsinGreek porphurā purple dye, purple garment ; see purple . opsin