antioxidant

/AE0 N T IY0 AA1 K S AH0 D AH0 N T/
noun
  1. 1

    Any substance that acts to slow or prevent the oxidation of another chemical.

  2. 2

    (nutrition) One of a group of vitamins that act against the effects of free radicals.

Antonyms

adjective
  1. 1

    Acting or having agents that act against oxidation.

Source: https://en.wiktionary.org/wiki/antioxidant