glow plug


Definition of glow plug

: a heating element in a diesel-engine cylinder to preheat the air and facilitate starting also : a similar element for ignition in other internal combustion engines

Examples of glow plug in a Sentence

Recent Examples on the Web Thanks to active thermal management and ceramic glow plugs, an engine block heater is not needed until minus-22 degrees F, Chevy said. Jeff Yip, Houston Chronicle, 2 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'glow plug.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of glow plug

circa 1941, in the meaning defined above

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Time Traveler for glow plug

Time Traveler

The first known use of glow plug was circa 1941

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Dictionary Entries Near glow plug

glow lamp

glow plug


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Cite this Entry

“Glow plug.” Dictionary, Merriam-Webster, Accessed 7 Dec. 2021.

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