Dictionary.com

antioxidant

[ an-tee-ok-si-duhnt, an-tahy- ]
/ ˌæn tiˈɒk sɪ dənt, ˌæn taɪ- /
Save This Word!

noun

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.

adjective

Chemistry. of or relating to an antioxidant.

QUIZZES

QUIZ YOURSELF ON AFFECT VS. EFFECT!

In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.

Origin of antioxidant

1925–30; anti- + oxidant (oxid(ize) + -ant)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for antioxidant

antioxidant
/ (ˌæntɪˈɒksɪdənt) /

noun

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

Medical definitions for antioxidant

antioxidant
[ ăn′tē-ŏksĭ-dənt, ăn′tī- ]

n.

A chemical compound or substance that inhibits oxidation.
A substance, such as vitamin E, vitamin C, or beta-carotene, thought to protect body cells from the damaging effects of oxidation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for antioxidant

antioxidant
[ ăn′tē-ŏksĭ-dənt, ăn′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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Essays. Emails. Everything. Get Help Now!