- (in an automotive ignition system) a transformer consisting of two wire windings or coils in which low-voltage direct current is fed through the primary winding to generate high-voltage spark pulses in the secondary winding.
Origin of ignition coil
First recorded in 1895–1900
Also called coil.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- an induction coil that supplies the high voltage to the sparking plugs of an internal-combustion engine