autoxidize
/ˌɔːtəʊksɪˈdaɪz/Definitions
1. verb
to undergo self-sustaining oxidation, especially of fats and oils, often resulting in spoilage or rancidity
“The oil autoxidized quickly when exposed to heat and air.”
2. verb, transitive
to cause (a substance) to undergo self-sustaining oxidation, especially of fats and oils
“The heat autoxidized the oil, causing it to turn rancid.”
3. noun
the process of undergoing self-sustaining oxidation, especially of fats and oils
“The autoxidization of the oil caused the food to spoil.”