spontaneous combustion spontaneous abortion • spontaneous generation · · · Info · Definitions · Characters · · spontaneous combustion · · Text Common · · Latin · · Scripts 22 · · Length 6 · · Syllables Definitions · · · (noun) ignition of a substance (as oily rags) resulting from an internal oxidation process. Synonyms: spontaneous combustion. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075