cornea

noun

cor·​nea ˈkȯr-nē-ə How to pronounce cornea (audio)
: the transparent part of the coat of the eyeball that covers the iris and pupil and admits light to the interior see eye illustration
corneal adjective

Examples of cornea in a Sentence

Recent Examples on the Web Artificial tears can help with lubrication and comfort as the cornea heals. Alyssa Hui, Verywell Health, 3 Apr. 2024 But the eye is quite a challenge for electronics design: With one of the highest nerve densities of any human tissue, the cornea is 300 to 600 times as sensitive as our skin. IEEE Spectrum, 1 Apr. 2024 The Sun emits intense ultraviolet and infrared light, which, while not visible to the human eye, can burn sensitive ocular tissues, such as the cornea and retina. Geoffrey Bradford, The Conversation, 12 Mar. 2024 Because the cornea receives its nutrients through fluid in the eye, Daluvoy wonders if dyes, some of which contain metal, could damage the cornea over time. Katie Camero, USA TODAY, 11 Jan. 2024 Just ask an ophthalmologist to laser a chemical dye into your cornea or have a silicone iris surgically implanted instead. Katie Camero, USA TODAY, 11 Jan. 2024 The cornea, the eye's protective surface, can also be damaged by UVB rays, which cause pain and poor vision. USA TODAY, 21 Feb. 2024 According to Beyer, rubbing the eye too hard could cause an injury to the cornea. Julia Landwehr, Health, 26 Jan. 2024 The corneal endothelium is a thin layer of cells that forms the inner lining of the cornea. William A. Haseltine, Forbes, 17 Feb. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cornea.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 25 Apr. 2024.

Kids Definition

cornea

noun
cor·​nea ˈkȯr-nē-ə How to pronounce cornea (audio)
: the transparent part of the coat of the eyeball that covers the iris and pupil and lets light through to the interior
corneal adjective

Medical Definition

cornea

noun
cor·​nea ˈkȯr-nē-ə How to pronounce cornea (audio)
: the transparent part of the coat of the eyeball that covers the iris and pupil and admits light to the interior
corneal adjective

More from Merriam-Webster on cornea

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