Definition of opsin in English:


Line breaks: opsin
Pronunciation: /ˈɒpsɪn


[mass noun] Biochemistry
  • A protein which forms part of the visual pigment rhodopsin and is released by the action of light.
    More example sentences
    • Rhodopsin consists of a protein called opsin bonded to a pigment called retinal.
    • Vitamin A then combines with a protein opsin to form rhodopsin.
    • Visual pigments are composed of a light-absorbing chromophore that is bound to the protein opsin.


1950s: shortening of rhodopsin.

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