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Definition of spontaneous combustion noun from the Oxford Advanced Learner's Dictionary

spontaneous combustion

noun

/spɒnˌteɪniəs kəmˈbʌstʃən/

/spɑːnˌteɪniəs kəmˈbʌstʃən/

[uncountable]

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the burning of a mineral or vegetable substance caused by chemical changes inside it and not by fire or heat from outside

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See spontaneous combustion in the Oxford Advanced American Dictionary

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