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

Origin and Etymology of opsin

probably from rhodopsin


Medical Dictionary

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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