retinal

¹

[ ret-n-uhl ]

adjective

1. of or relating to the retina of the eye.

retinal

²

[ ret-n-al, -awl ]

noun

, Biochemistry.

1. an orange pigment, C 2 0 H 2 8 O, that is the active component of rhodopsin and is liberated upon the absorption of light in the vision cycle; vitamin A aldehyde.

Word History and Origins

Origin of retinal¹

First recorded in 1830–40; retin(a) + -al ¹

Origin of retinal²

First recorded in 1940–45; retin(a) + -al ³

Example Sentences

They contained a diverse range of retinal cell types, which formed neuronal networks that actually responded to light and sent those signals into the brain.

From Singularity Hub 

Diagnosed with a retinal disease at the National Eye Institute at 15, he stopped driving his third year of law school at the University of Chicago.

From Washington Post

These guys receive data from other retinal cells—such as those encoding color—and extend their long “arms” to form the main highway between the eyes and the visual cortex.

From Singularity Hub 

What’s more, a healthy retina reacts in real time to the amount and intensity of light striking it, becoming more reactive in low-light conditions and less reactive in bright light, to prevent damage to retinal cells.

From Time

In some practices, a technique called wide-field retinal imaging may be offered instead of dilating your eyes for an exam.

From Washington Post

To complement brain wiring, everyone walks around with retinal cams.

From The Daily Beast

He saw Andy as his comrade in anti-retinal and utterly abnormal art.

From The Daily Beast

What could come closer to the anti-retinal position of Duchamp than paintings so dark they can barely impinge on our retinas?

From The Daily Beast

In order then to avoid diplopia the macula lutea moves to where the retinal image is formed.

From Project Gutenberg

Single vision was also present when looking strongly to one side, and with differentiation of one retinal image by a red glass.

From Project Gutenberg

This is generally accounted for by fatigue of the retinal process.

From Project Gutenberg

The retinal image of the object is not only vague, but also distorted.

From Project Gutenberg

Retinal hmorrhages are frequent and usually small, but a considerable hmorrhage may take place into the vitreous.

From Project Gutenberg