eyeball

[ahy-bawl]
noun
1.
the ball or globe of the eye.
2.
eyeballs, Informal. people who view or read something: Old TV shows are getting a lot of eyeballs online.
verb (used with object)
3.
Informal. to look at, check, or observe closely: two opponents eyeballing each other.
Idioms
4.
give (someone) the hairy eyeball, Slang. to look at (someone) with eyelids partly lowered, as in hostility or distrust.

Origin:
1580–90; 1900–05 for def 3; eye + ball1

eyeballer, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
eyeball (ˈaɪˌbɔːl)
 
n
1.  the entire ball-shaped part of the eye
2.  eyeball to eyeball in close confrontation
 
vb
3.  slang (tr) to stare at

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

eyeball
1580s, n., from eye + ball (1). As a verb, 1901, Amer.Eng.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

eyeball eye·ball (ī'bôl')
n.

  1. The globe-shaped portion of the eye surrounded by the socket and covered externally by the eyelids. Also called bulb of eye.

  2. The eye itself.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang Dictionary

eyeball definition


  1. tv.
    to look hard at someone or something. : The two eyeballed each other and walked on.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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Encyclopedia Britannica
Encyclopedia

eyeball

spheroidal structure containing sense receptors for vision, found in all vertebrates and constructed much like a simple camera. The eyeball houses the retina-an extremely metabolically active layer of nerve tissue made up of millions of light receptors (photoreceptors)-and all of the structures needed to focus light onto it. The sclera, the tough protective outer shell of the eyeball, is composed of dense fibrous tissue that covers four-fifths of the eyeball and provides attachments for the muscles that move the eye. The sclera is itself covered anteriorly by the conjunctiva, a transparent mucous membrane that prevents the eye from drying out. At the front of the eye, the tear film covers the transparent cornea, the "window" through which light passes into the eye. Working in concert with the aqueous humour behind it, the cornea provides the greatest focusing power of the eye. However, unlike the lens, the shape and focusing power of the cornea are not adjustable. Other important structures in the eyeball include the iris and the lens. Much of the eyeball is filled with a transparent gel-like material, called the vitreous humour, that helps to maintain the spheroidal shape

Learn more about eyeball with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The program could be put into these devices and operated with a mouse,
  tracker-ball or stylus, instead of an eyeball.
Or if you get sick its because you touched your eyeball in between contact with
  a virus and a hand washing.
On his left pectoral is a skull with one eyeball dangling from the socket by a
  cord of veins.
Facing eyeball to eyeball is sure to provoke a fight.
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