antioxidant

noun

an·​ti·​ox·​i·​dant ˌan-tē-ˈäk-sə-dənt 

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

Supplementing with taurine may also help support exercise recovery through its antioxidant and anti-inflammatory effects, protecting against muscle damage and reducing soreness after intense activity. —Jillian Kubala, Rd, Health, 5 Nov. 2024

Vitamin C serums deliver antioxidants to the complexion and support a more even-looking skin tone. —Jessie Quinn, People.com, 1 Nov. 2024

They’re filled with antioxidants that benefit everything from gut to heart to brain health. —Jeanne Ballion, Vogue, 31 Oct. 2024

Every product is formulated with their exclusive Commence Complex, a blend of alfalfa extract to support hair growth, quinoa peptides to add volume, acai stem cells for antioxidants that provide anti-aging perks and a Lactobacillus ferment, bio-fermentation technology that calms the scalp. —Celia Shatzman, Forbes, 30 Oct. 2024

Word History

First Known Use

1919, in the meaning defined above

Kids Definition

antioxidant

noun

an·​ti·​ox·​i·​dant ˌant-ē-ˈäk-səd-ənt 

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- 

: 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