retinal

1 of 2

adjective

ret·​i·​nal ˈre-tə-nəl How to pronounce retinal (audio)
ˈret-nəl
: of, relating to, involving, or being a retina

retinal

2 of 2

noun

ret·​i·​nal ˈre-tə-ˌnal How to pronounce retinal (audio)
-ˌnȯl
: a yellowish to orange aldehyde C20H28O derived from vitamin A that in combination with proteins forms the visual pigments of the retinal rods and cones

Examples of retinal in a Sentence

Recent Examples on the Web
Adjective
In particular, cardiologist Eric Topol delivered a compelling overview of how deep learning has been shown in research to detect seemingly unrelated diseases from X-rays, cardiograms, and retinal scans. Benj Edwards, Ars Technica, 18 Oct. 2023 During the 2017 total solar eclipse, a young woman was diagnosed with solar retinopathy, retinal damage from exposure to solar radiation, in both eyes after viewing the eclipse with what doctors believed were eclipse glasses not held to the safety standard. Ashley Strickland, CNN, 3 Mar. 2024 This is very, very different than a retinal implant driving vision. IEEE Spectrum, 15 Aug. 2023 That's because there is a higher concentration of retinal ganglion cells in the center of their field of vision, making vision sharper and giving such dogs binocular depth vision. Jennifer Ouellette, Ars Technica, 21 Dec. 2023 The reason: There have been no new cases of retinal occlusive vasculitis, or ROV, reported in people receiving injections of Syfovre. Adam Feuerstein, STAT, 14 Aug. 2023 The numbers correspond to the amount of retinal in the product’s formula. Justin Fenner, Robb Report, 4 Jan. 2024 In place of facial-recognition technology (FRT), other biometrics, such as fingerprinting and retinal scanning, came to market. Jesse Barron, The Atlantic, 1 Nov. 2023 But rather than resurrecting Second Sight’s retinal technology, Cortigent is now pursuing a brain implant to help people with blindness. IEEE Spectrum, 7 Nov. 2023
Noun
Follow it up with a moisturizer or night cream to hydrate the skin and lock in the retinal. Madison Yauger, Peoplemag, 15 Mar. 2023 Using gentle microdermabrasion scrubs, retinals, and other exfoliation-boosting products can help prevent them, as does avoiding using heavy creams and makeup. Amanda Chan, Teen Vogue, 8 Oct. 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'retinal.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Noun

retin- + -al entry 3

First Known Use

Adjective

1798, in the meaning defined above

Noun

1944, in the meaning defined above

Time Traveler
The first known use of retinal was in 1798

Dictionary Entries Near retinal

Cite this Entry

“Retinal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retinal. Accessed 28 Mar. 2024.

Medical Definition

retinal

1 of 2 adjective
ret·​i·​nal ˈret-ᵊn-əl, ˈret-nəl How to pronounce retinal (audio)
: of, relating to, involving, or being a retina
a retinal examination
retinal rods

retinal

2 of 2 noun
ret·​i·​nal ˈret-ᵊn-ˌal How to pronounce retinal (audio) -ˌȯl How to pronounce retinal (audio)
: a yellowish to orange aldehyde C20H28O derived from vitamin A that in combination with proteins forms the visual pigments of the retinal rods and cones

called also retinene, retinene1, vitamin A aldehyde

More from Merriam-Webster on retinal

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