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[ok-si-dey-shuh n] /ɒk sɪˈdeɪ ʃən/
noun, Chemistry
the process or result of oxidizing.
the deposit that forms on the surface of a metal as it oxidizes.
Also, oxidization
[ok-si-duh-zey-shuh n] /ˌɒk sɪ dəˈzeɪ ʃən/ (Show IPA)
Origin of oxidation
1785-95; oxide + -ation
Related forms
oxidational, oxidative, adjective
nonoxidation, noun
nonoxidative, adjective
nonoxidization, noun
overoxidization, noun
reoxidation, noun
self-oxidation, noun
unoxidative, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for oxidation
  • The damaging process called oxidation is an important trigger in the atherosclerosis story.
  • But those processes rely on steam or oxidation to produce the syngas.
  • The redox half-reaction for hydrogen oxidation is relatively simple and is shown on the left side of the scheme below.
  • If you do cut raw ulu, dip the pieces in water as you cut them to prevent oxidation.
  • Photographing the jagged, rusty remnants, he captured an unexpected range of brilliant colors created by the material's oxidation.
  • The catalytic oxidation process can also work against water-borne pathogens.
  • It also slows down the oxidation that occurs when they are exposed to sun and snow, he said.
  • But the gas is quickly rained out, as well as consumed through oxidation of rocks and volcanic gases.
  • Then it's embedded in paraffin, which prevents oxidation.
  • The surface oxidation forms a barrier that tends to protect the aluminium from rusting further.
British Dictionary definitions for oxidation


  1. the act or process of oxidizing
  2. (as modifier): an oxidation state, an oxidation potential
Derived Forms
oxidational, adjective
oxidative, adjective
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 oxidation

1791, from French oxidation (1787), coined by G. de Morveau and A. Lavoisier, noun of action from oxider "oxidize," from oxide (see oxide).

Online Etymology Dictionary, © 2010 Douglas Harper
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oxidation in Medicine

oxidation ox·i·da·tion (ŏk'sĭ-dā'shən)

  1. The combination of a substance with oxygen.

  2. A reaction in which the atoms in an element lose electrons and the valence of the element is correspondingly increased.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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oxidation in Science
  1. The chemical combination of a substance with oxygen.

  2. A chemical reaction in which an atom or ion loses electrons, thus undergoing an increase in valence. Removing an electron from an iron atom having a valence of +2 changes the valence to +3. Compare reduction.

oxidative adjective
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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oxidation in Culture

oxidation definition

Any chemical reaction in which a material gives up electrons, as when the material combines with oxygen. Burning is an example of rapid oxidation; rusting is an example of slow oxidation. (See combustion and reduction.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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