Definition of antioxidant noun from the Oxford Advanced Learner's Dictionary

     

    antioxidant

     noun
    noun
    BrE BrE//ˌæntiˈɒksɪdənt//
     
    ; NAmE NAmE//ˌæntiˈɑːksɪdənt//
     
     
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  1. 1 (biology) a substance such as vitamin C or E that removes dangerous molecules, etc., such as free radicals from the body
  2. 2 (chemistry) a substance that helps prevent oxidation, especially one used to help prevent stored food products from going bad
See the Oxford Advanced American Dictionary entry: antioxidant