the ignition of a substance or body from the rapid oxidation of its own constituents without heat from any external source.
the ignition of a substance or body as a result of internal oxidation processes, without the application of an external source of heat, occurring in finely powdered ores, coal, straw, etc
The bursting into flame of a mass of material as a result of chemical reactions within the substance, without the addition of heat from an external source. Oily rags and damp hay, for example, are subject to spontaneous combustion.
spontaneous combustion definition
A process by which a collection of materials (such as oily rags) catches fire without the application of heat from outside. The oxidation of substances in the materials starts the fire.
- Spontaneous gangrene of newborn
spontaneous gangrene of newborn n. Gangrene due to vascular occlusion of unknown cause, usually in marasmic or dehydrated infants.
noun, Biology. 1. abiogenesis. spontaneous generation noun 1. a theory, widely held in the 19th century and earlier but now discredited, stating that living organisms could arise directly and rapidly from nonliving material Also called abiogenesis spontaneous generation The supposed development of living organisms from nonliving matter, as maggots from rotting meat. The theory of […]
adjective 1. coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned: a spontaneous burst of applause. 2. (of a person) given to acting upon sudden impulses. 3. (of natural phenomena) arising from internal forces or causes; independent of external agencies; self-acting. 4. growing naturally or without cultivation, […]
- Spontaneous mutation
spontaneous mutation n. A mutation that arises naturally and not as a result of exposure to mutagens. Also called natural mutation.