glow plug
noun Automotive, Machinery.
a device for each cylinder of a diesel engine with a heating element to heat the incoming fuel and air so that combustion will take place more readily when the engine is cold.
Origin of glow plug
First recorded in 1940–45
OTHER WORDS FROM glow plug
glow-plug, adjectiveWords nearby glow plug
glover's suture,
gloversville,
glow,
glow discharge,
glow lamp,
glow plug,
glow-worm,
glower,
glowfly,
glowing,
glowstick
British Dictionary definitions for glow plug
glow plug
noun
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