
1) Arcus
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https://www.crosswordclues.com/clue/cornea

1) Covering for a pupil 2) External eye part 3) Eye bank donation 4) Eye component 5) Eye layer 6) Eye membrane 7) Eye part 8) Eye piece 9) Eye site 10) Eye surface 11) Eye tissue 12) Eye window 13) Eyeball coat 14) Eyeball covering 15) Human eye anatomy 16) Iris cover 17) Iris covering 18) It covers the eye
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https://www.crosswordclues.com/clue/cornea

• (n.) The transparent part of the coat of the eyeball which covers the iris and pupil and admits light to the interior. See Eye.
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http://thinkexist.com/dictionary/meaning/cornea/

(L. corneus horny) (NA) the transparent structure forming the anterior part of the fibrous tunic of the eye. It consists of five layers : (1) the anterior corneal epithelium, continuous with that of the conjunctiva, (2) the anterior limiting layer (Bowman's membrane), (3) the substantia propria, or stroma, (4) the posterior limiting layer (Descem.....
Found on
http://users.ugent.be/~rvdstich/eugloss/DIC/dictio21.html

A thin, curved transparent membrane on the surface of the front of the eye. It begins the focusing process for vision.
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http://www.bbc.co.uk/radio4/reith2003/glossary.shtml
[Noun] Plural form: corneas. The clear skin that covers the outside of the eyeball.
Example: Today at school we were taught about the eye and the cornea.
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http://www.bbc.co.uk/skillswise/glossary/

dome-shaped transparent membrane about 12 mm (0.5 inch) in diameter that covers the front part of the eye. Except at its margins, the cornea contains ... [10 related articles]
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http://www.britannica.com/eb/a-z/c/142

Credit: St Luke's Cataract & Laser Institute The transparent, dome-shaped layer that covers the front of the eye. It is a powerful refracting surface, providing 65-75 percent of the eye's focusing power. The cornea also protects the eye, helps shields it from undesirable elements like germs and...
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http://www.daviddarling.info/encyclopedia/C/cornea.html

<anatomy, ophthalmology> The transparent structure forming the anterior part of the fibrous tunic of the eye. It consists of five layers: ... 1. The anterior corneal epithelium, continuous with that of the conjunctiva. ... 2. The anterior limiting layer (Bowman's membrane). ... 3. The substantia propria or stroma. ... 4. The posterior limitin...
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http://www.encyclo.co.uk/local/20973

(kor´ne-ә) the clear, transparent anterior covering of the eye. The cornea is subject to injury by foreign bodies in the eye, bacterial infection, and viral infection, especially by the herpesvirus that causes herpes simplex. The herpesvirus that causes herpes zoster (shingles) can also infect the cornea. Prompt t...
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http://www.encyclo.co.uk/local/21001

The clear, dome-shaped "window" at the front of the eye that covers the iris and pupil. The cornea plays an important role in vision because it provides approximately 70 percent of the eye's light-focusing power. Contact lenses rest on the corneal surface.
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http://www.encyclo.co.uk/local/21361
Cor'ne·a noun ;
plural Corneas (-...z). [ Fem. sing., from Latin
corneus horny, from
cornu a horn. See
Horn .]
(Anat.) The transparent part of the coat of the eyeball which covers the iris and pupil and admits light to the interior. See
Eye .
Found on
http://www.encyclo.co.uk/webster/C/161

(KOR-nee-uh) Transparent front part of the eye that covers the iris, pupil, and anterior chamber and provides most of an eye's optical power
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http://www.eyeglossary.net/

Cuticle covering the compound eye or ocellus.
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http://www.geog.ubc.ca/biodiversity/efauna/InsectGlossary.html

Cornea: The clear front window of the eye that transmits and focuses light into the eye. Although the cornea is clear and seems to lack substance, it is a highly organized group of cells and proteins. Unlike most tissues in the body, the cornea contains no blood vessels to nourish or protect it against infection. Instead, the cornea receives its no...
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http://www.medterms.com/script/main/art.asp?articlekey=7248

(kor;ne-ua) The transparent, convex, anterior portion of the outer layer of the eyeball.
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http://www.mhhe.com/biosci/abio/glossary.mhtml

The cornea is the bulge at the front of the eye. It is clear and glassy and lies under the conjunctiva, a thin protective membrane. The cornea lets light rays into the eye and bends, or refracts, them. The iris lies just behind the cornea.
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http://www.probertencyclopaedia.com/browse/EC.HTM

It is the transparent front section of the eye. The cornea is curved and behaves as a fixed lens, so that light entering the eye is partly focused before it reaches the lends.
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http://www.vidyagyaan.com/general-knowledge/science/important-botany-terms-

cornea The clear front window of the eyes that transmits and focuses light into the eyes. Although the cornea is clear and seems to lack substance, it is a highly organized group of cells and proteins. Unlike most tissues in the body, the cornea contains no blood vessels to nourish or protect it against infection. Instead, the cornea receives its...
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http://www.wordinfo.info/words/index/info/view_unit/543/

cornea, horny.
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https://aclandanatomy.com/Glossary.aspx

the clear, dome-shaped front portion of the eye's outer covering
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https://www.encyclo.co.uk/local/20875
noun transparent anterior portion of the outer covering of the eye; it covers the lens and iris and is continuous with the sclera
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https://www.encyclo.co.uk/local/20974

Latin cornu = horn, hence, the dense tissue forming the front of the eyeball.
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https://www.encyclo.co.uk/local/21450

the outer, transparent surface of the compound eye.
Found on
https://www.encyclo.co.uk/local/22345

the clear, dome-shaped surface that covers the front of the eye.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---craniofaci
No exact match found.