SINCE 1828
opsin
noun
op·sin
| \ ˈäp-sən
\
\
Definition of opsin
: any of various colorless proteins that in combination with retinal or a related prosthetic group form a visual pigment (such as rhodopsin) in a reaction reversible by light
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More Definitions for opsin
opsin
noun
op·sin
| \ ˈäp-sən
\
\
Medical Definition of opsin
: any of various colorless proteins that in combination with retinal or a related prosthetic group form a visual pigment (as rhodopsin) in a reaction which is reversed by light
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