Antioxidant Definition

ăntē-ŏksĭ-dənt, ăntī-
antioxidants
noun
A chemical compound or substance that inhibits oxidation.
American Heritage
A substance that slows down the oxidation of hydrocarbons, oils, fats, etc. and thus helps to check deterioration: antioxidants are added to many products, esp. foods and soaps.
Webster's New World
A substance, such as vitamin E, vitamin C, or beta carotene, thought to protect body cells from the damaging effects of oxidation.
American Heritage
A substance that inhibits oxidation, especially one, such as vitamin E, vitamin C, or beta carotene, that protects cells from the sometimes damaging effects of oxidation.
American Heritage Medicine

Any substance that acts to slow or prevent the oxidation of another chemical.

Wiktionary
adjective
Serving to check oxidation.
Webster's New World
Acting or having agents that act against oxidation.
Wiktionary

Other Word Forms of Antioxidant

Noun

Singular:
antioxidant
Plural:
antioxidants

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antioxidant