spark plug

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  • noun

Synonyms for spark plug

electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark

References in periodicals archive ?
You're going to have gasoline and oil shooting out of those spark-plug holes when you crank this thing, so the last thing you want nearby is high-voltage spark unless you've got a very good insurance policy and are looking to upgrade this rig.
A Chicago teacher has been accused of punishing disruptive students with prolonged electric shocks, using a spark-plug and a current-producing crank.
That means there's only one correct spark-plug type for your truck, Tony.