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[ok-si-dahyz] /ˈɒk sɪˌdaɪz/ Chemistry
verb (used with object), oxidized, oxidizing.
to convert (an element) into an oxide; combine with oxygen.
to cover with a coating of oxide or rust.
to take away hydrogen, as by the action of oxygen; add oxygen or any nonmetal.
to remove electrons from (an atom or molecule), thereby increasing the valence.
Compare reduce (def 12).
verb (used without object), oxidized, oxidizing.
to become oxidized.
(especially of white wine) to lose freshness after prolonged exposure to air and often to darken in color.
Also, especially British, oxidise.
Origin of oxidize
1795-1805; oxide + -ize
Related forms
oxidizable, oxidable
[ok-si-duh-buh l] /ˈɒk sɪ də bəl/ (Show IPA),
oxidizability, noun
antioxidizing, adjective
half-oxidized, adjective
nonoxidizable, adjective
nonoxidizing, adjective
overoxidize, verb, overoxidized, overoxidizing.
reoxidize, verb, reoxidized, reoxidizing.
underoxidize, verb (used with object), underoxidized, underoxidizing.
unoxidizable, adjective
unoxidized, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for oxidized
  • When the zinc oxidized, it reacted with a cathode and the copper was reduced.
  • By several hours later, oxygen is no longer detectable because it has already oxidized some of those aromatic volatiles.
  • The electrode materials, usually oxidized metals, change color when an ion such as lithium moves into and out of them.
  • The reason why mitochondrial symbionts can make the necessary simplified energy plants for eukaryotes is an oxidized atmosphere.
  • These oxidized metals have a large surface area and a strong electric charge that helps them bind up other elements in the water.
  • Never mind that no one knows if metallic hydrogen can be feasibly oxidized.
  • So the molecule can't go through with the process of being oxidized for fuel.
  • Many of the resulting oxidized organic compounds have a brown color.
  • For both of the reactions shown, the hydrogen molecules are oxidized and the oxygen atoms are reduced.
  • When you put the oil into the engine, it is essentially degraded by heating it, and is also oxidized.
British Dictionary definitions for oxidized


to undergo or cause to undergo a chemical reaction with oxygen, as in formation of an oxide
to form or cause to form a layer of metal oxide, as in rusting
to lose or cause to lose hydrogen atoms
to undergo or cause to undergo a decrease in the number of electrons Compare reduce (sense 12c)
Derived Forms
oxidization, oxidisation, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for oxidized



1802 (implied in oxidizable), from oxide + -ize. Related: Oxidized; oxidizing; oxidization.

Online Etymology Dictionary, © 2010 Douglas Harper
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oxidized in Medicine

oxidize ox·i·dize (ŏk'sĭ-dīz')
v. ox·i·dized, ox·i·diz·ing, ox·i·diz·es

  1. To combine with oxygen; change into an oxide.

  2. To increase the positive charge or valence of an element by removing electrons.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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oxidized in Science
To undergo or cause to undergo oxidation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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