iodopsin

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

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

Learn More About iodopsin

Time Traveler for iodopsin

Time Traveler

The first known use of iodopsin was in 1938

See more words from the same year

Dictionary Entries Near iodopsin

iodophor

iodopsin

iodoso-

See More Nearby Entries 

Statistics for iodopsin

Cite this Entry

“Iodopsin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/iodopsin. Accessed 27 Nov. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for iodopsin

iodopsin

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

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

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!