retinene

British

/ ˈrɛtɪnəl, ˈrɛtɪˌniːn /

noun

the aldehyde form of the polyene retinol (vitamin A) that associates with the protein opsin to form the visual purple pigment rhodopsin

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of retinene

C20: from _retina + _-ene

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The rhodopsin divides into retinene and opsin.

From Time Magazine Archive

When this mixture is placed in the dark, the enzymes convert the vitamin A to retinene, a yellow pigment.

From Time Magazine Archive

Then the retinene combines with the opsin to form bright red rhodopsin.

From Time Magazine Archive

The retinene reverts to vitamin A. This is just what happens when light shines into a dark-adapted eye: the rhodopsin in the rods is suddenly decomposed.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023