iodopsin

noun
io·dop·sin | \ ˌī-ə-ˈdäp-sən \

Definition of iodopsin 

: a photosensitive violet pigment in the retinal cones that is similar to rhodopsin but more labile, is formed from vitamin A, and is important in daylight vision

First Known Use of iodopsin

1938, in the meaning defined above

History and Etymology for iodopsin

iod- (from Greek ioeidḗs "violet-colored") + -opsin (in rhodopsin) — more at iodine

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The first known use of iodopsin was in 1938

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iodopsin

noun
io·dop·sin | \ ˌī-ə-ˈdäp-sən \

Medical Definition of iodopsin 

: a photosensitive violet pigment in the retinal cones that is similar to rhodopsin but more labile, is formed from vitamin A, and is important in photopic vision

More from Merriam-Webster on iodopsin

Britannica.com: Encyclopedia article about iodopsin

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occurring twice a year or every two years

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