iodopsin

noun

io·​dop·​sin ˌī-ə-ˈdäp-sən How to pronounce iodopsin (audio)
: 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

Dictionary Entries Near iodopsin

Cite this Entry

“Iodopsin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/iodopsin. Accessed 22 Jun. 2024.

Medical Definition

iodopsin

noun
io·​dop·​sin ˌī-ə-ˈdäp-sən How to pronounce iodopsin (audio)
: 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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