Medical Dictionary

photopsin pho·top·sin (fō-tŏp'sĭn)
The protein component of the pigment iodopsin in the cones of the retina of the eye.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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