Pronunciation: (an"tē-ok'si-dunt, an"tī-),[key] —n. 1. Chem.any substance that inhibits oxidation, as a substance that inhibits oxidative deterioration of gasoline, rubbers, plastics, soaps, etc.
2. Biochem.an enzyme or other organic substance, as vitamin E or beta carotene, that is capable of counteracting the damaging effects of oxidation in animal tissues.