antioxidant

[ an-tee-ok-si-duh nt, an-tahy- ]
/ ˌæn tiˈɒk sɪ dənt, ˌæn taɪ- /

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.

Origin of antioxidant

1925–30; anti- + oxidant (oxid(ize) + -ant)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for antioxidant

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

Science 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.