cornea
Americannoun
noun
Other Word Forms
Etymology
Origin of cornea
1350–1400; Middle English < Medieval Latin cornea ( tēla, later tunica ) horny (web or tunic), feminine of corneus corneous
Explanation
Your cornea is part of your eyeball — specifically, it's the clear layer that covers your whole iris and pupil. Without a cornea (or two), you wouldn't be able to see. This transparent dome focuses light as it passes through, as well as protecting the rest of the eye from injury. If you've ever gotten a little scratch on your eyeball, that's called a corneal abrasion and it usually heals itself quickly. The Latin root of cornea means "horn-like web or sheath," from an ancient Greek belief that it resembled a thin slice of an animal's horn.
Vocabulary lists containing cornea
As Long as the Lemon Trees Grow
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Man Made Monsters
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Instead of carving away tissue like LASIK, the method temporarily softens the cornea so it can be gently molded into a new shape.
From Science Daily • May 28, 2026
That limitation inspired researchers to search for a way to reshape the cornea without making incisions at all.
From Science Daily • May 28, 2026
Originally introduced in Europe, this 20-minute cosmetic procedure involves using a laser to create a channel in the cornea, where colored pigment is deposited to change the color of the eye.
From Salon • May 4, 2025
Keratoconus causes the cornea to thin and weaken, leading to vision distortion, not ideal for someone hitting baseballs for a living.
From Los Angeles Times • Apr. 25, 2025
Even after her cornea transplant, Mammachi could only see light and shadow.
From "The God of Small Things" by Arundhati Roy
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
