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

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 The 53-year-old can’t see well enough anymore to drive at night and had noticed new white spots near her cornea. al, 26 Apr. 2022 Since the cornea is responsible for much of the eye’s ability to focus, progressive visual impairment is universal. Dr. Keith Roach, oregonlive, 11 Apr. 2022 The result was that Jahnigen had a rare eye disease that affects the structure of the cornea and results in vision loss. Brooks Sutherland, The Enquirer, 18 Jan. 2022 Samples of blood, urine, and aqueous humor (the liquid that nourishes the cornea) were screened for the presence of hundreds of substances, both legal medications and prohibited drugs. Tim Sullivan, The Courier-Journal, 11 Feb. 2022 The surgery strengthened Jahnigen's cornea and he was fitted for some prescription glasses. Brooks Sutherland, The Enquirer, 18 Jan. 2022 The lens of the eye, along with the cornea, bends the light coming into the eye so it is perfectly focused on the retina. Dr. Keith Roach, oregonlive, 3 Jan. 2022 Long-term contact use can lead to loss of sensation in the cornea, the eye's clear surface, Dr. Maskin explains. Jenny Mccoy, Health.com, 27 Oct. 2021 Any misalignment between the lens and the front of your eyeball can end up damaging your cornea and potentially beyond. Bruce Y. Lee, Forbes, 30 Oct. 2021 See More

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.

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

Buying Guide

Our Reviews team has selected the best blue light glasses.

Learn More About cornea

Time Traveler for cornea

Time Traveler

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

See more words from the same century

Dictionary Entries Near cornea

corne-

cornea

corneagen

See More Nearby Entries 

Statistics for cornea

Last Updated

16 May 2022

Cite this Entry

“Cornea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cornea. Accessed 23 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for cornea

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

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

WORD OF THE DAY

Test Your Vocabulary

Great Words for Scrabble

  • scrabble tiles that read scrabble quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!