porphyropsin
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por·phy·rop·sin
(pôr′fə-rŏp′sĭn)n.
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.
[Greek porphurā, purple dye, purple garment; see purple + opsin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
porphyropsin
(ˌpɔːfɪˈrɒpsɪn)n
(Biochemistry) a purple pigment occurring in the retina of the eye of certain freshwater fishes
[C20: from Greek porphura purple + -opsis + -in, on the model of rhodopsin]
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