antioxidant

an·ti·ox·i·dant

noun \ˌant-ē-ˈäk-səd-ənt, ˌan-ˌtī-\

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