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Definition of Spark plug
1. Noun. Electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark.
Exact synonyms: Plug, Sparking Plug
Generic synonyms: Electrical Device
Group relationships: Ignition, Ignition System
Generic synonyms: Electrical Device
Group relationships: Ignition, Ignition System
Definition of Spark plug
1. Noun. The part of an internal combustion engine which forms a high-voltage electric spark which ignites the fuel-air mixture to begin the power stroke. ¹
¹ Source: wiktionary.com