por·phy·rop·sin (pôr f -r p s n)n. A purple pigment similar to rhodopsin, found in the rods of the retinas of freshwater fishes and certain frogs. [Greek porphur  , shellfish yielding purple dye, purple + opsin.] |
porphyropsin [ˌpɔːfɪˈrɒpsɪn]
n
(Life Sciences & Allied Applications / Biochemistry) a purple pigment occurring in the retina of the eye of certain freshwater fishes
[from Greek porphura purple + -opsis + -in, on the model of rhodopsin]
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