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English word
WORDNET DICTIONARY
CIDE DICTIONARY
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WORDNET DICTIONARY
Noun spark plug has 1 sense
- spark plug(n = noun.artifact) plug, sparking plug - electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark; is a kind of electrical device
is a part of ignition, ignition system
CIDE DICTIONARY
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.]