'Spark plug' definitions:
Definition of 'spark plug'
From: WordNet
noun
Electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark [syn: spark plug, sparking plug, plug]
Definition of 'Spark plug'
From: GCIDE
- Spark plug \Spark plug\ In internal-combustion engines with electric ignition, a plug, screwed into the cylinder head, connected with the induction coil or magneto circuit on the outside, and used to produce a spark to ignite the fuel-air mixture in the engine. [Webster 1913 Suppl. +PJC]
Synonyms of 'spark plug'
From: Moby Thesaurus
- abettor,
- activator,
- actuator,
- animator,
- arouser,
- cajoler,
- coax,
- coaxer,
- encourager,
- energizer,
- firer,
- gadfly,
- galvanizer,
- human dynamo,
- impeller,
- inducer,
- inspirer,
- life,
- motivating force,
- motive power,
- mover,
- moving spirit,
- persuader,
- pleader,
- prime mover,
- prompter,
- restorative,
- spark,
- sparker,
- stimulant,
- stimulator,
- stimulus,
- tempter,
- tonic,
- wheedler