spark plug
noun
1
: a part that fits into the cylinder head of an internal combustion engine and carries two electrodes separated by an air gap across which the current from the ignition system discharges to form the spark for combustion
2
: one that initiates or gives impetus to an undertaking
Examples of spark plug in a Sentence
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Only without the spark plugs. Ingredients of life After micro-lightnings started jumping between droplets in a mixture of gases similar to that used by Miller and Urey, the team examined their chemical composition with a mass spectrometer.
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Ars Technica, 14 Mar. 2025
Holt, Jordan’s spark plug, struggled to start hitting only one of seven shots in the first two quarters, including missing all three shots from beyond the arc.
—Charles Baggarly, Fort Worth Star-Telegram, 9 Mar. 2025
Kayleigh Heckel has been a spark plug off the bench.
—Ryan Kartje, Los Angeles Times, 3 Mar. 2025
Then the spark plug ignites a local fire, producing enough gas to push the pressure past that threshold.
—IEEE Spectrum, 30 July 2018
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Ars Technica, 14 Mar. 2025
Holt, Jordan’s spark plug, struggled to start hitting only one of seven shots in the first two quarters, including missing all three shots from beyond the arc.
—Charles Baggarly, Fort Worth Star-Telegram, 9 Mar. 2025
Kayleigh Heckel has been a spark plug off the bench.
—Ryan Kartje, Los Angeles Times, 3 Mar. 2025
Then the spark plug ignites a local fire, producing enough gas to push the pressure past that threshold.
—IEEE Spectrum, 30 July 2018
See All Example Sentences for spark plug
Cite this Entry
“Spark plug.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spark%20plug. Accessed 19 Apr. 2025.
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