spark plug
noun Date: 1903 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 • sparkplug transitive verb

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • spark|plug — spark plug, 1. a device in the cylinder of an internal combustion engine by which the mixture of gasoline and air is exploded by an electric spark. 2. Informal, Figurative. a person who gives energy or enthusiasm to others: »The shortstop is the… …   Useful english dictionary

  • spark-plug — spark plug, 1. a device in the cylinder of an internal combustion engine by which the mixture of gasoline and air is exploded by an electric spark. 2. Informal, Figurative. a person who gives energy or enthusiasm to others: »The shortstop is the… …   Useful english dictionary

  • Spark plug — In internal combustion engines with electric ignition, a plug, screwed into the cylinder head, connected with the induction coil or magneto circuit on the outside, and used to produce a spark to ignite the fuel air mixture in the engine. [Webster …   The Collaborative International Dictionary of English

  • spark plug — spark′ plug n. 1) aum elm a device that ignites the fuel mixture in a cylinder of an internal combustion engine 2) inf a person who leads, inspires, or animates • Etymology: 1900–05 spark′plug , v.t. plugged, plug•ging …   From formal English to slang

  • spark plug — also sparking plug BrE n a part in a car engine that produces an electric ↑spark to make the petrol mixture start burning …   Dictionary of contemporary English

  • spark plug — spark ,plug noun count a small part in a car s engine that creates a SPARK that makes the fuel burn …   Usage of the words and phrases in modern English

  • spark plug — spark plugs N COUNT A spark plug is a device in the engine of a motor vehicle, which produces electric sparks to make the petrol burn …   English dictionary

  • spark plug — (also sparking plug) ► NOUN ▪ a device for firing the explosive mixture in an internal combustion engine …   English terms dictionary

  • spark plug — ☆ spark plug n. 1. an electrical device threaded into the cylinder of an internal combustion engine to ignite the fuel mixture by producing timed sparks between electrodes 2. Informal a person or thing that inspires, activates, or advances… …   English World dictionary

  • Spark plug — A spark plug (also, very rarely nowadays, in British English: a sparking plug) is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed aerosol gasoline by means of an electric spark.… …   Wikipedia

  • spark plug — A device containing two electrodes across which electricity jumps to produce a spark to fire the fuel charge. The center electrode is insulated from the spark plug shell by means of a molded insulator resembling porcelain. The side electrode… …   Dictionary of automotive terms

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