opsin

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈɒpsɪn/US:USA pronunciation: respellingUSA pronunciation: respelling(op′sin)


WordReference Random House Unabridged Dictionary of American English © 2025
op•sin  (op′sin),USA pronunciation n. [Biochem.]
  1. Biochemistryany of several compounds that form the protein component of the light-sensitive retina pigment, rhodopsin.
  • probably back formation from rhodopsin 1950–55

Collins Concise English Dictionary © HarperCollins Publishers::
opsin / ˈɒpsɪn/
  1. the protein that together with retinene makes up the purple visual pigment rhodopsin
Etymology: 20th Century: back formation from rhodopsin
'opsin' also found in these entries (note: many are not synonyms or translations):
iodopsin - retinene - rhodopsin

Forum discussions with the word(s) "opsin" in the title:


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