A spark plug (sometimes, in British English, a sparking plug, and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine. Wikipedia, Spark Plug
See Also
Atomic Dissociation
Burn
Burning
combustion
Exciter
Impulse
Magneto
Molecular Dissociation
Spark
14.25 - Dominant is Light of Electrical Spark