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porphyropsin

 - 2 dictionary results
por·phy·rop·sin   (pôr'fə-rŏp'sĭn)   
n.  A purple pigment similar to rhodopsin, found in the rods of the retinas of freshwater fishes and certain frogs.

[Greek porphurā, shellfish yielding purple dye, purple + opsin.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: por·phy·rop·sin
Pronunciation: "por-f&-'räp-s&n
Function: noun
: a purple pigment in the retinal rods offreshwater fishes that resembles rhodopsin
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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