rhodopsin

noun
rho·dop·sin | \ rō-ˈdäp-sən \

Definition of rhodopsin 

: a red photosensitive pigment in the retinal rods of the eye of most vertebrates that is important in vision in dim light

called also visual purple

Examples of rhodopsin in a Sentence

Recent Examples on the Web

Some use chlorophyll to convert sunlight during photosynthesis and others use rhodopsins, proteins that bind to a form of vitamin A called retina to capture light. Shandria Sutton, Science | AAAS, "New ‘light-eating’ protein discovered in the Sea of Galilee," 5 July 2018

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

First Known Use of rhodopsin

1878, in the meaning defined above

History and Etymology for rhodopsin

International Scientific Vocabulary rhod- + Greek opsis sight, vision + International Scientific Vocabulary -in entry 1 — more at optic

Keep scrolling for more

Learn More about rhodopsin

Statistics for rhodopsin

Last Updated

16 Aug 2018

Look-up Popularity

Time Traveler for rhodopsin

The first known use of rhodopsin was in 1878

See more words from the same year

Keep scrolling for more

More Definitions for rhodopsin

rhodopsin

noun
rho·dop·sin | \ rō-ˈdäp-sən \

Medical Definition of rhodopsin 

: a red photosensitive pigment in the retinal rods of marine fishes and most higher vertebrates that is important in vision in dim light, is quickly bleached by light to a mixture of opsin and retinal, and is regenerated in the dark

called also visual purple

More from Merriam-Webster on rhodopsin

Britannica.com: Encyclopedia article about rhodopsin

Comments on rhodopsin

What made you want to look up rhodopsin? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to deposit or conceal in a hiding place

Get Word of the Day daily email!

Test Your Vocabulary

Name that Food Quiz

Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

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!