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peroxide

[puh-rok-sahyd] /pəˈrɒk saɪd/
noun
1.
Chemistry.
  1. hydrogen peroxide, H 2 O 2 or H–O–O–H.
  2. a compound containing the bivalent group –O 2 –, derived from hydrogen peroxide, as sodium peroxide, Na 2 O 2 , or dimethyl peroxide, C 3 H 6 O 2 .
  3. the oxide of an element that contains an unusually large amount of oxygen.
verb (used with object), peroxided, peroxiding.
2.
to use peroxide as a bleaching agent on (especially the hair).
Origin
1795-1805
1795-1805; per- + oxide
Related forms
peroxidic
[pur-ok-sid-ik] /ˌpɜr ɒkˈsɪd ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for per oxide

peroxide

/pəˈrɒksaɪd/
noun
1.
short for hydrogen peroxide, esp when used for bleaching hair
2.
any of a class of metallic oxides, such as sodium peroxide, Na2O2, that contain the divalent ion O-O
3.
(not in technical usage) any of certain dioxides, such as manganese peroxide, MnO2, that resemble peroxides in their formula but do not contain the O-O ion
4.
any of a class of organic compounds whose molecules contain two oxygen atoms bound together. They tend to be explosive
5.
(modifier) of, relating to, bleached with, or resembling peroxide
verb
6.
(transitive) to bleach (the hair) with peroxide
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 per oxide

peroxide

n.

1804, formed in English from per- "large amount" + oxide. Peroxide blonde is attested from 1918.

Online Etymology Dictionary, © 2010 Douglas Harper
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per oxide in Medicine

peroxide per·ox·ide (pə-rŏk'sīd')
n.

  1. A compound, such as sodium peroxide, that contains a peroxy group and yields hydrogen peroxide when treated with an acid.

  2. Hydrogen peroxide.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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per oxide in Science
peroxide
  (pə-rŏk'sīd')   
  1. A compound containing the group O2. Peroxides are strong oxidizers and are used as industrial bleaches. When any peroxide is combined with an acid, one of the products is hydrogen peroxide.

  2. Hydrogen peroxide.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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