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: the transparent part of the coat of the eyeball that covers the iris and pupil and admits light to the interior see eye illustration
Examples of cornea in a Sentence
Recent Examples on the Web
Risk factors for refractive errors include having an eyeball that is too long or short or problems with the shape of your cornea.
—Vanessa Caceres, Verywell Health, 21 Nov. 2024
Poorly fitting lenses or those made with unsafe materials can block oxygen to the cornea, leading to complications like swelling or inflammation.
—Alyssa Hui-Anderson, Verywell Health, 23 Oct. 2024
This can lead to serious eye infections like keratitis, an inflammation of the cornea caused by bacteria or fungi.
—Alyssa Hui-Anderson, Verywell Health, 23 Oct. 2024
Healthcare providers use an ultrasound imaging device to measure the thickness of the cornea.
—Mark Gurarie, Health, 3 Oct. 2024
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Word History
Etymology
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
First Known Use
14th century, in the meaning defined above
Time Traveler
The first known use of cornea was
in the 14th century
Dictionary Entries Near cornea
Cite this Entry
“Cornea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cornea. Accessed 13 Dec. 2024.
Kids Definition
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
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