ret·i·nal
ˈre-tə-ˌnal 
-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
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
In a second study, conducted by a different research group using data from the U.K. Biobank, a deep learning program proved effective at analyzing retinal imaging as an early detection tool for heart disease in high-risk groups, such as people who have prediabetes and Type 2 diabetes.
—Bysage Lazzaro, Fortune, 7 Nov. 2023
Mary Tyler Moore: Her Life in Pictures Prior to her death in 2017, Levine reveals Moore attempted to conceal her vision loss from diabetic retinal disease, which can lead to blindness.
—Stephanie Wenger, Peoplemag, 26 May 2023
The winning entry: a rodent optic nerve head with astrocytes (yellow), contractile proteins (red), and retinal vasculature (green).
—Jennifer Ouellette, Ars Technica, 17 Oct. 2023
Medik8 Crystal Retinal 3 Serum A cream, in a variety of retinal concentrations, plus hyaluronic acid, glycerin, and vitamin E to improve radiance, texture, and skin tone.
—Kiana Murden, Vogue, 11 Oct. 2023
And don’t forget mental illness and retinal health.
—Andrew Joseph, STAT, 9 Oct. 2023
While it’s performed as an outpatient procedure, patients are required to go into the office of their eye care provider or retinal specialist to receive the eye injection.
—Alyssa Hui, Verywell Health, 18 Sep. 2023
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
See More
Adjective
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
In a second study, conducted by a different research group using data from the U.K. Biobank, a deep learning program proved effective at analyzing retinal imaging as an early detection tool for heart disease in high-risk groups, such as people who have prediabetes and Type 2 diabetes.
—Bysage Lazzaro, Fortune, 7 Nov. 2023
Mary Tyler Moore: Her Life in Pictures Prior to her death in 2017, Levine reveals Moore attempted to conceal her vision loss from diabetic retinal disease, which can lead to blindness.
—Stephanie Wenger, Peoplemag, 26 May 2023
The winning entry: a rodent optic nerve head with astrocytes (yellow), contractile proteins (red), and retinal vasculature (green).
—Jennifer Ouellette, Ars Technica, 17 Oct. 2023
Medik8 Crystal Retinal 3 Serum A cream, in a variety of retinal concentrations, plus hyaluronic acid, glycerin, and vitamin E to improve radiance, texture, and skin tone.
—Kiana Murden, Vogue, 11 Oct. 2023
And don’t forget mental illness and retinal health.
—Andrew Joseph, STAT, 9 Oct. 2023
While it’s performed as an outpatient procedure, patients are required to go into the office of their eye care provider or retinal specialist to receive the eye injection.
—Alyssa Hui, Verywell Health, 18 Sep. 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
See More
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
Phrases Containing retinal
Dictionary Entries Near retinal
Cite this Entry
“Retinal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retinal. Accessed 11 Dec. 2023.
Copy Citation
Medical Definition
retinal
1 of 2 adjective
ret·i·nal
ˈret-ᵊn-əl, ˈret-nəl
: of, relating to, involving, or being a retina
a retinal examination
retinal rods
retinal
2 of 2 noun
ret·i·nal
ˈret-ᵊn-ˌal
-ˌȯl
-ˌȯl
: 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
Britannica.com: Encyclopedia article about retinal
Love words? Need even more definitions?
Merriam-Webster unabridged
Share