antioxidant

noun

an·​ti·​ox·​i·​dant ˌan-tē-ˈäk-sə-dənt How to pronounce antioxidant (audio)
ˌan-ˌtī-
: a substance (such as beta-carotene or vitamin C) that inhibits oxidation or reactions promoted by oxygen, peroxides, or free radicals
antioxidant adjective

Examples of antioxidant in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Turmeric has been widely studied for its anti-inflammatory, antioxidant, and disease-preventing benefits.1514 8. Jamie Johnson, Verywell Health, 8 Apr. 2025 If antioxidants are good for cancers, then boosting reactive oxygen molecules might fight some kinds of metastasis. Amber Dance, Smithsonian Magazine, 4 Apr. 2025 That's likely because of its star ingredient, thyme, which is rich in antioxidants and boasts antibacterial, antiviral and anti-inflammatory properties. Vicky Hallett, NPR, 1 Apr. 2025 Wellness shots containing ingredients like turmeric, ginger, and honey offer a quick boost of vitamins and antioxidants to support your health. Chelsea Rae Bourgeois, Rdn, Ld, Health, 26 Mar. 2025 See All Example Sentences for antioxidant

Word History

First Known Use

1919, in the meaning defined above

Time Traveler
The first known use of antioxidant was in 1919

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Cite this Entry

“Antioxidant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antioxidant. Accessed 22 Apr. 2025.

Kids Definition

antioxidant

noun
an·​ti·​ox·​i·​dant ˌant-ē-ˈäk-səd-ənt How to pronounce antioxidant (audio)
ˌan-ˌtī-
: a substance that opposes oxidation or prevents or makes difficult reactions made easier by oxygen

Medical Definition

antioxidant

noun
an·​ti·​ox·​i·​dant ˌant-ē-ˈäk-səd-ənt, ˌan-ˌtī- How to pronounce antioxidant (audio)
: 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

More from Merriam-Webster on antioxidant

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