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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
First recorded in 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. 2018.
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Examples from the Web for unoxidized
Historical Examples
  • The unoxidized minute traces of sugar signified imperfect combustion.

  • Deeper down in the earth comes the unoxidized zone which continues indefinitely.

    An African Adventure Isaac F. Marcosson
  • It is only the unoxidized pale greenish stuff that can act as the dye, the dark brown itself has no affinity for the wool.

    Vegetable Dyes

    Ethel M. Mairet
  • In calculating the available energy, correction is made for the unoxidized residue, as urea and allied forms.

British Dictionary definitions for unoxidized


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 unoxidized



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

Online Etymology Dictionary, © 2010 Douglas Harper
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unoxidized 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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unoxidized 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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