retinal

2
[ ret-n-al, -awl ]
/ ˈrɛt nˌæl, -ˌɔl /

noun Biochemistry.

an orange pigment, C20H28O, that is the active component of rhodopsin and is liberated upon the absorption of light in the vision cycle; vitamin A aldehyde.

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Also ret·i·nene [ret-n-een] /ˈrɛt nˌin/.

Origin of retinal

2
First recorded in 1940–45; retin(a) + -al3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for retinene

retinene

retinal (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

Word Origin for retinene

C20: from retina + -ene
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

Medical definitions for retinene (1 of 2)

retinene
[ rĕtn-ēn′ ]

n.

Either of two yellow to red retinal pigments, formed by oxidation of vitamin A alcohols.

Medical definitions for retinene (2 of 2)

retinal
[ rĕtn-ăl′, -ôl′ ]

n.

retinaldehyde
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.