OPSIN


Meaning of OPSIN in English

noun Etymology: probably from rhod~ Date: 1951 any of various colorless proteins that in combination with retinal or a related prosthetic group form a visual pigment (as rhod~) in a reaction reversible by light

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.