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opsin

One entry found.

Main Entry:
op·sin 
          Listen to the pronunciation of opsin
Pronunciation:
\ˈäp-sən\
Function:
noun
Etymology:
probably from rhodopsin
Date:
1951
: any of various colorless proteins that in combination with retinal or a related prosthetic group form a visual pigment (as rhodopsin) in a reaction reversible by light


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