antioxidant

noun an·ti·ox·i·dant \ ˌan-tē-ˈäk-sə-dənt , ˌan-ˌtī- \
Updated on: 9 Dec 2017

Definition of antioxidant

: a substance (such as beta-carotene or vitamin C) that inhibits oxidation or reactions promoted by oxygen, peroxides, or free radicals

antioxidant

adjective

Recent Examples of antioxidant from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'antioxidant.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of antioxidant

1919


ANTIOXIDANT Defined for English Language Learners

antioxidant

noun

Definition of antioxidant for English Language Learners

  • : a substance that is added to food and other products to prevent harmful chemical reactions in which oxygen is combined with other substances


Medical Dictionary

antioxidant

noun an·ti·ox·i·dant \ ˌant-ē-ˈäk-səd-ənt, ˌan-ˌtī- \

medical Definition of antioxidant

: any of various substances (as beta-carotene, vitamin C, and alpha-tocopherol) that inhibit oxidation or reactions promoted by oxygen and peroxides and that include many held to protect the living body from the deleterious effects of free radicals

antioxidant

adjective

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allowing a liquid or gas to pass through

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