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Meaning of autoxidation

au•tox•i•da•tion

Pronunciation: (ô-tok"si-dā'shun), [key]
— n. Chem.
  1. the oxidation of a compound by exposure to air.
  2. an oxidation reaction in which another substance, in addition to air and the compound being oxidized, must be present.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.