sparking plug

noun

British.

1. spark plug.

sparking plug

noun

1. Also called: spark plug. a device screwed into the cylinder head of an internal-combustion engine to ignite the explosive mixture by means of an electric spark which jumps across a gap between a point earthed to the body of the plug and the tip of a central insulated rod

Word History and Origins

Origin of sparking plug¹

First recorded in 1900–05