opsin
[op-sin]
noun Biochemistry.
any of several compounds that form the protein component of the light-sensitive retina pigment, rhodopsin.
Origin of opsin
First recorded in 1950–55; probably back formation from rhodopsin
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
opsin
noun
Word Origin for opsin
C20: back formation from rhodopsin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
opsin
[ŏp′sĭn]
n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.