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[an-tee-ok-si-duh nt, an-tahy-] /ˌæn tiˈɒk sɪ dənt, ˌæn taɪ-/
Chemistry. any substance that inhibits oxidation, as a substance that inhibits oxidative deterioration of gasoline, rubbers, plastics, soaps, etc.
Biochemistry. an enzyme or other organic substance, as vitamin E or beta carotene, that is capable of counteracting the damaging effects of oxidation in animal tissues.
Chemistry. of or relating to an antioxidant.
1925-30; anti- + oxidant (oxid(ize) + -ant) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for antioxidants
  • Most of the secondary plant metabolites are antioxidants, which help prevent human diseases.
  • They re-supply the body with carbohydrates, usually antioxidants and sometimes amino acids and caffeine.
  • Raisins contain antioxidants, which may have helped mask the rancid flavor of spoiling meat in the days before refrigeration.
  • If memory efficiency and preservation are at the top of your priority list, antioxidants should be up there too.
  • They give her natural antioxidants that may help prevent cancer.
  • Think of antioxidants as preventing rust in the body.
  • Previous tries at using vegetable oils in cars started with refined oils with all the natural antioxidants removed.
  • The researchers believe the antioxidants in cocoa keep free radicals from damaging cells the body.
  • Check wouldn't reveal the proprietary mix of nutrients, except to confirm that it contains antioxidants.
  • Albeit, it was sponsored by a chocolate company trying to tout protective qualities of cocoa-based antioxidants.
British Dictionary definitions for antioxidants


any substance that retards deterioration by oxidation, esp of fats, oils, foods, petroleum products, or rubber
(biology) a substance, such as vitamin C, vitamin E, or beta carotene, that counteracts the damaging effects of oxidation in a living organism
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 antioxidants


1920 (n.); 1932 (adj.), from anti- + oxidant.

Online Etymology Dictionary, © 2010 Douglas Harper
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antioxidants in Science
  (ān'tē-ŏk'sĭ-dənt, ān'tī-)   
A chemical compound or substance that inhibits oxidation. Certain vitamins, such as vitamin E, are antioxidants and may protect body cells from damage caused by the oxidative effects of free radicals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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