retina

[ ret-n-uh, ret-nuh ]

/ ˈrɛt n ə, ˈrɛt nə /

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noun, plural ret·i·nas, ret·i·nae

[ret-n-ee]. /ˈrɛt nˌi/. Anatomy.

the innermost coat of the posterior part of the eyeball that receives the image produced by the lens, is continuous with the optic nerve, and consists of several layers, one of which contains the rods and cones that are sensitive to light.

Trademark, Computers.

Retina, a brand name used by Apple, Inc., to describe display screens having a resolution so high that it is difficult to see individual pixels with the human eye: a Retina display; Retina technology; Retina quality.

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Origin of retina

1350–1400; Middle English ret(h)ina<Medieval Latin rētina, perhaps equivalent to Latin rēt- (stem of rēte) net + -ina-ine¹

Other definitions for retina (2 of 2)

Retin-A

[ ret-n-ey ]

/ ˌrɛt nˈeɪ /

Pharmacology, Trademark.

a brand of tretinoin, used especially to reduce wrinkles caused by overexposure to the sun.

Origin of Retin-A

First recorded in 1975–80

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use retina in a sentence

ROME — What does it take for a Hollywood A-lister to get a private audience with Pope Francis?
Pope Francis Has the Pleasure of Meeting Angelina Jolie for a Few Seconds|Barbie Latza Nadeau|January 8, 2015|DAILY BEAST
Yes, Byrd—dead four-and-a-half years now—was a Kleagle in the Ku Klux Klan.
Steve Scalise and the Right’s Ridiculous Racial Blame Game|Michael Tomasky|January 2, 2015|DAILY BEAST
By the time it concluded with a sing-a-long of “XO,” Beyoncé had done the rare thing.
Bow Down, Bitches: How Beyoncé Turned an Elevator Brawl Into a Perfect Year|Kevin Fallon|December 31, 2014|DAILY BEAST
In another year, stories about the strange new face of an A-list actress might draw chortles and cackles.
Renée Zellweger Got a New Face—and Everyone Had An Opinion About It|Kevin O’Keeffe|December 29, 2014|DAILY BEAST

Because Duck Dynasty receives monster TV ratings and Robertson paid by a company (A&E) while making these public statements.
Butts, Brawls, and Bill Cosby: The Biggest Celebrity Scandals of 2014 |Kevin Fallon|December 27, 2014|DAILY BEAST
Now-a-days it is the bankrupt who flouts, and his too confiding creditors who are jeered and laughed at.
Glances at Europe|Horace Greeley
He felt himself the meanest, vilest thing a-crawl upon this sinful earth, and she—dear God!
St. Martin's Summer|Rafael Sabatini
All that scientific bric-a-brac in the cupboard had far better be thrown away.
The Salvaging Of Civilisation|H. G. (Herbert George) Wells
Urinary sediments may be studied under three heads: A. Unorganized sediments.
A Manual of Clinical Diagnosis|James Campbell Todd
I knowed, a-course, that I could go kick up a fuss when Simpson stopped by his office on his trip back from Goldstone.
Alec Lloyd, Cowpuncher|Eleanor Gates

British Dictionary definitions for retina

retina

/ (ˈrɛtɪnə) /

noun plural -nas or -nae (-ˌniː)

the light-sensitive membrane forming the inner lining of the posterior wall of the eyeball, composed largely of a specialized terminal expansion of the optic nerve. Images focused here by the lens of the eye are transmitted to the brain as nerve impulses

Derived forms of retina

retinal, adjective

Word Origin for retina

C14: from Medieval Latin, perhaps from Latin rēte net

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for retina (1 of 2)

retina

[ rĕt′n-ə ]

n. pl. ret•i•nas

The delicate multilayered light-sensitive membrane lining the inner posterior chamber of the eyeball containing the rods and cones and connected by the optic nerve to the brain.

Other words from retina

ret′i•nal adj.

Medical definitions for retina (2 of 2)

Retin-A

[ rĕt′n-ā′ ]

A trademark for a preparation of retinoic acid.

Scientific definitions for retina

retina

[ rĕt′n-ə ]

Plural retinas retinae (rĕt′n-ē′)

The light-sensitive membrane that lines the inside of the back of the eyeball and connects to the brain by the optic nerve. The retina of vertebrate animals contains rods and cones, specialized cells that absorb light.

Cultural definitions for retina

retina

[ (ret-n-uh) ]

The inner layer of the eye, sensitive to light, that is connected to the brain by the optic nerve. The retina lines the rear of the eye-ball. The lens of the eye focuses waves of light on the retina.