opsin

noun
op·​sin | \ ˈäp-sən How to pronounce opsin (audio) \

Definition of opsin

: any of various colorless proteins that in combination with retinal or a related prosthetic group form a visual pigment (such as rhodopsin) in a reaction reversible by light

Examples of opsin in a Sentence

Recent Examples on the Web Researchers still need to demonstrate that a virus can safely and reliably endow particular neurons with an opsin gene that sticks around for years. Kelly Servick, Science | AAAS, "New technologies promise sharper artificial vision for blind people," 31 Oct. 2019 To better understand the mechanics behind the species’ chameleon-esque appearance, Eacock, then a graduate student in Saccheri’s lab, tested caterpillars’ eyes and skin for light-sensitive proteins known as opsins. Meilan Solly, Smithsonian, "These Caterpillars Can Detect Color Using Their Skin Not Their Eyes," 27 Aug. 2019 Notably, silver spinyfin fish (Diretmus argenteus) turned out to have 38 rod opsin genes. David Grossman, Popular Mechanics, "Some Fish Can See in Color at 5,000 Feet Below Sea Level," 10 May 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'opsin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of opsin

1951, in the meaning defined above

History and Etymology for opsin

probably from rhodopsin

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Time Traveler for opsin

Time Traveler

The first known use of opsin was in 1951

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Statistics for opsin

Last Updated

17 Nov 2019

Cite this Entry

“Opsin.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/opsin. Accessed 7 December 2019.

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More Definitions for opsin

opsin

noun
op·​sin | \ ˈäp-sən How to pronounce opsin (audio) \

Medical Definition of opsin

: any of various colorless proteins that in combination with retinal or a related prosthetic group form a visual pigment (as rhodopsin) in a reaction which is reversed by light

More from Merriam-Webster on opsin

Britannica.com: Encyclopedia article about opsin

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