retina

noun
ret·​i·​na | \ ˈre-tə-nə How to pronounce retina (audio) , ˈret-nə\
plural retinas also retinae\ ˈre-​tə-​ˌnē How to pronounce retinae (audio) , -​ˌnī \

Definition of retina

: 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

Looking directly at the powerful brightness of the sun can cause damage to the retina, the light-sensitive part of the eye. Ashley Strickland, CNN, "Total solar eclipse moves across South America today," 2 July 2019 Rather than seeing an improvement in their condition, all three women showed up at eye hospitals days later with retinas detaching, rapidly worsening vision and hemorrhaging. NBC News, "FDA wins case against Florida stem cell clinic that harmed three women's vision," 4 June 2019 She was sent back to MetroHealth, where doctors found her retina had detached. Adam Ferrise, cleveland.com, "Woman left blind after fall at Cuyahoga County Jail, poor medical treatment, lawsuit says," 13 June 2019 Beyond these genetic effects, Scott developed thickening in his retina and in his carotid artery. Bill Ingalls, National Geographic, "One-of-a-kind study of astronaut twins hints at spaceflight’s health effects," 11 Apr. 2019 That's on top of the hefty price tag for its new Mac Pro desktop, which starts at $6,000, and a display monitor, the Pro Display XDR, a 32-inch 6K retina LCD display ($4,999). Amy Woodyatt, CNN, "Apple monitor stand that costs more than an iPhone sparks online uproar," 5 June 2019 Previous SlideNext Slide Apple's new display is a 32-inch LCD, 6016 x 3384, 6K retina display. Samuel Axon, Ars Technica, "Apple unveils the Pro Display XDR, a display unlike anything else on the market," 3 June 2019 Compared to CERN’s gleaming, space-age facility, where retina scanners are used to access the elevators leading down to the Large Hadron Collider, visiting the Tevatron is seriously old school. Peter Kujawinski, New York Times, "Colliders, Sundials and Wonder: When Science Is Your Destination," 28 May 2018 Set during China’s Three Kingdoms era (A.D. 220-280), this action extravaganza ravishes the retina with only a narrow segment of spectrum. Joe Morgenstern, WSJ, "‘Shadow’ Review: Not Everything Is Black and White," 2 May 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'retina.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of retina

14th century, in the meaning defined above

History and Etymology for retina

Middle English rethina, from Medieval Latin retina, probably from Latin rete net

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Dictionary Entries near retina

retimber

retime

retin-

retina

retinaculate

retinaculum

retinal

Statistics for retina

Last Updated

10 Jul 2019

Look-up Popularity

Time Traveler for retina

The first known use of retina was in the 14th century

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More Definitions for retina

retina

noun

English Language Learners Definition of retina

: the sensitive tissue at the back of the eye that receives images and sends signals to the brain about what is seen

retina

noun
ret·​i·​na | \ ˈre-tə-nə How to pronounce retina (audio) \
plural retinas also retinae\ -​ˌnē \

Kids Definition of retina

: the membrane that lines the back part of the eyeball, contains the rods and cones, and converts the images received by the lens into signals that are transmitted to the brain

retina

noun
ret·​i·​na | \ ˈret-ᵊn-ə, ˈret-nə How to pronounce retina (audio) \
plural retinas also retinae\ -​ᵊn-​ˌē How to pronounce retinae (audio) \

Medical Definition of retina

 (Entry 1 of 2)

: 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

trademark
Ret·​in-A | \ ˌret-ᵊn-ˈā How to pronounce Retin-A (audio) \

Medical Definition of Retin-A (Entry 2 of 2)

used for a preparation of tretinoin

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More from Merriam-Webster on retina

Spanish Central: Translation of retina

Nglish: Translation of retina for Spanish Speakers

Britannica English: Translation of retina for Arabic Speakers

Britannica.com: Encyclopedia article about retina

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