Dictionary.com

opsin

[ op-sin ]
/ ˈɒp sɪn /
Save This Word!

noun Biochemistry.

any of several compounds that form the protein component of the light-sensitive retina pigment, rhodopsin.

QUIZZES

QUIZ YOURSELF ON THE 12 TYPES OF VERB TENSES!

Loosen up your grammar muscles because it’s time to test your knowledge on verb tenses!
Question 1 of 6
The verb tenses can be split into which 3 primary categories?

Meet Grammar Coach

Write or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing

Meet Grammar Coach

Improve Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

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. 2021

How to use opsin in a sentence

British Dictionary definitions for opsin

opsin
/ (ˈɒpsɪn) /

noun

the protein that together with retinene makes up the purple visual pigment rhodopsin

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

Medical definitions for opsin

opsin
[ ŏpsĭn ]

n.

A protein of the retina, especially the protein constituent of rhodopsin, that makes up one of the visual pigments.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
FEEDBACK