American English

Definition of antioxidant noun from the Oxford Advanced American Dictionary



    , NAmE//ˌæntaɪ‑//
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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 Learner's Dictionary entry: antioxidant