plural retinas also retinae
ˈre-tə-ˌnē 
-ˌnī
: the sensory membrane that lines the eye, is composed of several layers including one containing the rods and cones, and functions as the immediate instrument of vision by receiving the image formed by the lens and converting it into chemical and nervous signals which reach the brain by way of the optic nerve see eye illustration
Examples of retina in a Sentence
Recent Examples on the Web
Biometric information comprises data on a range of a person's physical characteristics, including retina or iris scans, fingerprints, voiceprints, hand scans, facial geometry and DNA.
—
Eric Lagatta, USA TODAY, 16 Apr. 2024
Although not a perfect facsimile for Minority Report’s smart retina system, today’s devices are within striking distance of it.
—Bhaskar Chakravorti, Foreign Affairs, 7 July 2015
That's because the retina, the area of the eye susceptible to sun damage, doesn't have pain nerves.
—Binghui Huang, The Indianapolis Star, 11 Apr. 2024
The damage on her left retina, the area at the back of the eye where the brain receives images, looked like the shape of a partial eclipse.
—Chad Murphy, The Enquirer, 8 Apr. 2024
See all Example Sentences for retina 
Eric Lagatta, USA TODAY, 16 Apr. 2024
Although not a perfect facsimile for Minority Report’s smart retina system, today’s devices are within striking distance of it.
—Bhaskar Chakravorti, Foreign Affairs, 7 July 2015
That's because the retina, the area of the eye susceptible to sun damage, doesn't have pain nerves.
—Binghui Huang, The Indianapolis Star, 11 Apr. 2024
The damage on her left retina, the area at the back of the eye where the brain receives images, looked like the shape of a partial eclipse.
—Chad Murphy, The Enquirer, 8 Apr. 2024
See all Example Sentences for retina
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Cite this Entry
“Retina.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retina. Accessed 4 Jul. 2024.
Copy CitationKids Definition
retina
noun
ret·i·na
ˈret-ᵊn-ə
ˈret-nə
plural retinas also retinae
-ᵊn-ˌē
-ˌī
: the light-sensitive inner layer lining the back of the eye that contains the rods and cones and converts the images formed by the lens into signals which reach the brain by way of the optic nerve
retinal
adjective
-ᵊn-əl
-nəl
Medical Definition
retina
1 of 2 noun
ret·i·na
ˈret-ᵊn-ə, ˈret-nə
plural retinas also retinae
-ᵊn-ˌē
: the sensory membrane that lines most of the large posterior chamber of the vertebrate eye, is composed of several layers including one containing the rods and cones, and functions as the immediate instrument of vision by receiving the image formed by the lens and converting it into chemical and nervous signals which reach the brain by way of the optic nerve
Retin-A
2 of 2 trademark
Ret·in-A
ˌret-ᵊn-ˈā
—used for a preparation of tretinoin
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