9 Grammatical Pitfalls


[puh-rok-sahyd] /pəˈrɒk saɪd/
  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.
to use peroxide as a bleaching agent on (especially the hair).
Origin of peroxide
1795-1805; per- + oxide
Related forms
[pur-ok-sid-ik] /ˌpɜr ɒkˈsɪd ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for peroxide
  • Skip using hydrogen peroxide on the countertops, and add it to your laundry as a bleach alternative.
  • If you plan to clean with hydrogen peroxide, be sure to wear gloves when handling it.
  • Two other models, built for demo use only, run on hydrogen peroxide.
  • Use vinegar, hydrogen peroxide, or bleach solutions for best results.
  • Experts are even recommending drinking a litre of water after dyeing in order to dilute any peroxide absorbed through the skin.
  • It's super-simple to fly and uses two small but powerful hydrogen peroxide motors mounted at the tips of the rotor.
  • Hydrogen peroxide reduces other chemicals into iodide ions.
  • The skull parts were then covered in normal, drug store hydrogen peroxide for three days.
  • But if too much hydrogen peroxide builds up, it can produce more free radicals.
  • Look for peroxide-free, low- or no-ammonia formulas.
British Dictionary definitions for peroxide


short for hydrogen peroxide, esp when used for bleaching hair
any of a class of metallic oxides, such as sodium peroxide, Na2O2, that contain the divalent ion O-O
(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
any of a class of organic compounds whose molecules contain two oxygen atoms bound together. They tend to be explosive
(modifier) of, relating to, bleached with, or resembling peroxide
(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 peroxide

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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peroxide in Medicine

peroxide per·ox·ide (pə-rŏk'sīd')

  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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peroxide in Science
  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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