Noun
spontaneous combustion (countable and uncountable, plural spontaneous combustions)
Combustion without an external source of heat.
Synonym: autocombustion
Spontaneous combustion IS a form of harm, Mr. D," Chiron put in. Rick Riordan
Success isn't a result of spontaneous combustion. You must set yourself on fire. Arnold H. Glasow
Spontaneous combustion of grassroots politics is the future. Dick Morris
Success is not the result of spontaneous combustion. You must first set yourself on fire. Fred Shero
Arson is a respected profession among certain subcultures in Jersey, and the good ones don't get caught. The good ones channel lightning and mysterious acts of spontaneous combustion. Janet Evanovich
Farmers have to be careful about moisture levels to avoid spontaneous combustion, which is a leading cause of haystack fires. citation Heat is produced by the respiration process, which occurs until the moisture content of drying hay drops below 40%. Source: Internet