one of usually four plugs fitted to the cylinder block of a diesel engine that warms the engine chamber to facilitate starting in cold weather
Also called: heater plug
glow plug in Automotive Engineering
(gloʊ plʌg)
Word forms: (regular plural) glow plugs
noun
(Automotive engineering: Vehicle components, Engine, transmission, and exhaust)
A glow plug is an electrically heated plug that is fitted to the cylinder head of a diesel engineto make it easier to start the engine in cold conditions.
SIMILAR WORDS:
heater plug
The miniature motor doesn't need an ignition system, just a glow plug to get it started.
The glow plug circuit is used on the diesel engine to initially start the engine.
Each cylinder has a small glow plug that begins heating the air in the pre-combustion chamber.
plug, plug
Examples of 'glow plug' in a sentence
glow plug
If the engine is already warm, the glow plugs are not necessary so the light will not come on.