cornea

noun
cor·​nea | \ ˈkȯr-nē-ə How to pronounce cornea (audio) \

Definition of cornea

: the transparent part of the coat of the eyeball that covers the iris and pupil and admits light to the interior — see eye illustration

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Other Words from cornea

corneal \ ˈkȯr-​nē-​əl How to pronounce cornea (audio) \ adjective

Examples of cornea in a Sentence

Recent Examples on the Web So a liver cell's genome would have made the most important and relevant information the most accessible, whereas a cell in the cornea would be folded differently. Katherine Harmon, Scientific American, "Human Genome Untangled in 3-D," 2 Dec. 2011 The company’s drug targets cells in the cornea, the clear outer layer that covers the front of your eye. San Diego Union-Tribune, "San Diego biotech to test drug that replenishes eye’s lost cells," 20 Aug. 2020 His fellow surfer, Natalia Danilova, said in an Instagram post Friday that she was diagnosed with a chemical burn to her cornea after spending time in the water in the bay. NBC News, "Investigators probe 'possible ecological catastrophe' in Russia's Kamchatka region," 4 Oct. 2020 In recent years, new competitors to Gore-Tex have come onto the market, but the W.L. Gore company also makes guitar strings, headlight vents, heart stents, membranes used in electric car batteries and tissues for experimental cornea transplants. Washington Post, "Robert W. Gore, company president and inventor of Gore-Tex, dies at 83," 20 Sep. 2020 When cells along the bottom of the cornea die, your eye does a poor job of focusing light, which can lead to reduced vision or even blindness. San Diego Union-Tribune, "San Diego biotech to test drug that replenishes eye’s lost cells," 20 Aug. 2020 For instance, more than 100,000 people nationally are on the transplant list, waiting mostly for a kidney, but others also wait for a liver, cornea, heart, or muscle tissue. cleveland, "August is the month to make known that more minority organ and tissue donors are needed," 15 Aug. 2020 In fact, another team examined the eyes of deceased COVID patients and found that ACE2 receptors were located on both the surface and cornea of the eyes. Carolyn Barber, Fortune, "Eyeballs, asthmatics, and 3D-printed organs: New discoveries about COVID-19 abound," 7 Aug. 2020 Glatter said significant damage to the corneal epithelium, the outermost layer of the cornea, could lead to visual impairment. USA Today, "Going to protest George Floyd's death? Here's how to protect yourself against tear gas, pepper spray," 2 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cornea.' 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 cornea

14th century, in the meaning defined above

History and Etymology for cornea

Middle English, borrowed from Medieval Latin (short for cornea tēla "horny web," cornea tunica "horny covering," translating Greek kerātoeidḕs chitṓn), from feminine of Latin corneus "horny" — more at corneous

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Time Traveler for cornea

Time Traveler

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

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Statistics for cornea

Last Updated

29 Mar 2021

Cite this Entry

“Cornea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cornea. Accessed 10 Apr. 2021.

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More Definitions for cornea

cornea

noun

English Language Learners Definition of cornea

technical : the clear outer covering of the eyeball

cornea

noun
cor·​nea | \ ˈkȯr-nē-ə How to pronounce cornea (audio) \

Kids Definition of cornea

: the transparent outer layer of the front of the eye covering the pupil and iris

cornea

noun
cor·​nea | \ ˈkȯr-nē-ə How to pronounce cornea (audio) \

Medical Definition of cornea

: the transparent part of the coat of the eyeball that covers the iris and pupil and admits light to the interior

Other Words from cornea

corneal \ -​əl How to pronounce cornea (audio) \ adjective

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More from Merriam-Webster on cornea

Nglish: Translation of cornea for Spanish Speakers

Britannica English: Translation of cornea for Arabic Speakers

Britannica.com: Encyclopedia article about cornea

Comments on cornea

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