spark plug
nounDefinition of spark plug
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
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Other Words from spark plug
sparkplug
\ ˈspärk-ˌpləg 
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transitive verb
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transitive verb
Examples of spark plug in a Sentence
Recent Examples on the Web
After beginning the year in Triple-A New Orleans, the 29-year-old utility man has been a spark plug for the Marlins lineup, hitting .289/.346/.443 (110 wRC+), while providing tremendous defensive versatility. — Wells Dusenbury, sun-sentinel.com, "Jose Urena moving closer to return; Jon Berti making most of his opportunity with Marlins," 10 Aug. 2019 In a conventional four-stroke internal combustion gasoline engine, which works on the principle of suck-squeeze-bang-blow, the bang is created by a spark plug igniting the fuel-air mixture in the cylinder. — Jonathan M. Gitlin, Ars Technica, "Swapping spark plugs for nanopulses could boost engine efficiency by 20%," 26 June 2019 Few, if any, would have counted Hanser Alberto and Stevie Wilkerson as the Orioles’ spark plugs when this forsaken season began. — Jon Meoli, baltimoresun.com, "Orioles bats quiet again in 5-2 loss to Blue Jays," 3 Aug. 2019 In 2015, Moritz came to Ann Arbor from Germany, eventually blossoming into one of the Big Ten's top players and the spark plug to the Wolverines' run to the NCAA championship game in 2018. — Orion Sang, Detroit Free Press, "How Michigan rallied to save Franz Wagner's recruitment, after John Beilein left," 22 May 2019 In addition, spark plug Trea Turner is batting .203. — Jorge L. Ortiz, USA TODAY, "Cubs, Nationals and Dodgers aren't good right now. Which NL favorite is in real trouble?," 16 Apr. 2018 From spark plugs to engines to assembly, the GM locations dumped 10 million gallons of waste into the river every day, according to the Interior report. — Dustin Renwick, National Geographic, "Five years on, the Flint water crisis is nowhere near over," 25 Apr. 2019 Other automotive products that are part of the sale include motor oil, spark plugs, cleaning products, car audio components, and garage accessories. — Drew Dorian, Car and Driver, "Walmart Offering Tires at Huge Discounts for Memorial Day," 20 May 2019 This is his battlefield against cogwheels, fan belts, carburetors and radiators, spark plugs, and batteries. — Amos Oz, Harper's magazine, "Setting the World to Rights," 10 Apr. 2019These example sentences are selected automatically from various online news sources to reflect current usage of the word 'spark plug.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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