- of or relating to the retina of the eye.
Origin of retinal1
- 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.
Also ret·i·nene [ret-n-een] /ˈrɛt nˌin/.
Origin of retinal2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for retinal
To complement brain wiring, everyone walks around with retinal cams.The Internet Embedded in Your Head
November 21, 2014
Mike the Angel put his face in the rest for the retinal photos.
“Such as fingerprint and retinal patterns,” said Lieutenant Nariaki.
Retinal pattern 490-BJ4-67—which is also the code that is supposed to get me through your blockade.Planet of the Damned
This is generally accounted for by fatigue of the retinal process.Visual Illusions
The retinal image of the object is not only vague, but also distorted.Clever Hans
Word Origin and History for retinal
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.