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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
For anyone who’s been lucky enough not to experience it, snow blindness—technically called ultraviolet (UV) keratitis—happens when your corneas are exposed to too much ultraviolet light, which reflects off snow.
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Kristin Canning, SELF, 6 Feb. 2025
Keratoconus: Anyone diagnosed with keratoconus, in which the normally round cornea bulges forward in the shape of a cone, will not be able to undergo LASIK, as this will further weaken the already unstable tissue.
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Maxine Lipner, Verywell Health, 23 Oct. 2024
It is also found in bones, cartilage, and teeth and even fills out the cornea, which is present in the crystalline form.4
Many healthcare professionals use collagen to treat wounds, close grafts, heal tooth extraction sites, and improve recovery.
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Sherri Gordon, Health, 8 Jan. 2025
Her organs, including her kidneys, liver and corneas, were donated, according to a statement issued by Chania General Hospital.
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Matt Hamilton, Los Angeles Times, 4 Jan. 2025
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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 16 Feb. 2025.
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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