[ok-sahyd, -sid]
noun Chemistry.
a compound in which oxygen is bonded to one or more electropositive atoms.
Also, oxid [ok-sid] .

1780–90; < French (now oxyde), blend of oxygène and acide. See oxygen, acid

oxidic [ok-sid-ik] , adjective
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World English Dictionary
oxide (ˈɒksaɪd)
1.  any compound of oxygen with another element
2.  any organic compound in which an oxygen atom is bound to two alkyl or aryl groups; an ether or epoxide
[C18: from French, from ox(ygène) + (ac)ide; see oxygen, acid]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

"compound of oxygen with another element," 1790, from Fr. oxide (1787), coined by G. de Morveau and A. Lavoisier from ox(ygène) + (ac)ide. See oxygen.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

oxide ox·ide (ŏk'sīd')
A binary compound of an element or a radical with oxygen.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
oxide   (ŏk'sīd')  Pronunciation Key 
A compound of oxygen and another element or radical. Water (H2O) is an oxide.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Some wires, made of cobalt oxide and gold, become the negative poles of the
He welded them together and applied a patina of iron oxide.
More than three-quarters of agriculture's nitrous oxide emissions result from
  manmade fertilizers.
Thick- ness of backing and oxide coating must be constant.
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