1. 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]
WordNet (r) 3.0 (2006):
sparking plug
n 1: 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]