iodopsin

noun

io·dop·sin ˌī-ə-ˈdäp-sən

: 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

Word History

Etymology

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

First Known Use

1938, in the meaning defined above

Time Traveler

The first known use of iodopsin was in 1938

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Cite this Entry

Style

“Iodopsin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/iodopsin. Accessed 31 Mar. 2023.

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Medical Definition

iodopsin

noun

io·dop·sin ˌī-ə-ˈdäp-sən

: 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

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