retinal

[ ret-n-uhl ]

/ ˈrɛt n əl /

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adjective

of or relating to the retina of the eye.

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Origin of retinal

First recorded in 1830–40; retin(a) + -al¹

Words nearby retinal

retinaculum of fibular muscles, retinaculum of flexor muscles, retinaculum of peroneal muscles, retinaculum of skin, retinaculum tendinum, retinal, retinal adaptation, retinal cone, retinaldehyde, retinaldehyde isomerase, retinal detachment

Other definitions for retinal (2 of 2)

retinal²

[ 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.

Also ret·i·nene

[ret-n-een]. /ˈrɛt nˌin/.

Origin of retinal

First recorded in 1940–45; retin(a) + -al³

How to use retinal in a sentence

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.
This Week’s Awesome Tech Stories From Around the Web (Through August 21)|Singularity Hub Staff|August 21, 2021|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.
Judge David Tatel’s lack of eyesight never defined him, but his blindness is woven into the culture of the influential appeals court in D.C.|Ann Marimow|July 8, 2021|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.
How Gene Therapy and Algae Proteins Partially Restored a Blind Man’s Sight|Shelly Fan|May 25, 2021|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.
A Blind Patient Regained Partial Sight in a Breakthrough Study, Offering Hope to Millions|Jeffrey Kluger|May 24, 2021|Time

In some practices, a technique called wide-field retinal imaging may be offered instead of dilating your eyes for an exam.
How to safely get an eye exam and buy glasses during the pandemic|Lindsey Konkel|April 12, 2021|Washington Post
To complement brain wiring, everyone walks around with retinal cams.
The Internet Embedded in Your Head|J.T. Price|November 21, 2014|DAILY BEAST
He saw Andy as his comrade in anti-retinal and utterly abnormal art.
Warhol Looks at Duchamp Looking at Warhol|Blake Gopnik|January 6, 2014|DAILY BEAST
What could come closer to the anti-retinal position of Duchamp than paintings so dark they can barely impinge on our retinas?
Ad Reinhardt's Black (-on-Black) Humor|Blake Gopnik|December 2, 2013|DAILY BEAST
In order then to avoid diplopia the macula lutea moves to where the retinal image is formed.
Schweigger on Squint|C. Schweigger
Single vision was also present when looking strongly to one side, and with differentiation of one retinal image by a red glass.
Schweigger on Squint|C. Schweigger
This is generally accounted for by fatigue of the retinal process.
Visual Illusions|Matthew Luckiesh
The retinal image of the object is not only vague, but also distorted.
Clever Hans|Oskar Pfungst
Retinal hmorrhages are frequent and usually small, but a considerable hmorrhage may take place into the vitreous.
A System of Operative Surgery, Volume IV (of 4)|Various

Medical definitions for retinal

retinal

[ rĕt′n-ăl′, -ôl′ ]

retinaldehyde