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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Chiefly British A spark plug.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. spark plug

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark


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  • "...the two main dangers that can mar the performance of sparking plugs: overheating, on the one hand, and fouling, on the other." From a Smiths Motor Accessories Ltd. advert in the British agricultural journal The Countryman Autumn 1955, p.1

    January 20, 2010