spark plug
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spark plug
noun spark plugs · sparkplug · sparking plug
- The part of some internal combustion engines which forms a high-voltage electric spark which ignites the fuel-air mixture to begin the power stroke. (Petrol engines have spark plugs. Diesel engines do not have them because the heat from their high compression ratios supplies the ignition.) In the 21st century, it is not unusual for a set of spark plugs to last a decade or longer; gone are the days when changing the plugs annually was common.
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Someone who is a driving force in new endeavours.
Helen is a real spark plug. We're lucky she's on the team.
Similar: straw that stirs the drink, catalyst, instigator, mover and shaker, stimulus
- A rod (for cylindrical secondaries) or sphere (for spherical secondaries) of fissile material at the center of the secondary of a multistage thermonuclear weapon, which undergoes nuclear fission when compressed to supercriticality by the imploding secondary, helping to raise the secondary to the pressures and temperatures necessary to ignite nuclear fusion in the secondary's fusion fuel.
Translations
Every language
noun part of an internal combustion engine
| Español | bujía |
|---|---|
| 日本語 | 点火プラグ denka puragu, スパークプラグ supāku puragu |
| 中文 | 火花塞 huǒhuāsāi, 火星塞 |
| हिन्दी | स्पार्क प्लग spārk plag |
| Português | vela de ignição |
| Français | bougie d'allumage, bougie |
| Deutsch | Zündkerze |
| Italiano | candela di accensione |
| Ελληνικά | μπουζί bouzí, αναφλεκτήρας anaflektíras, σπινθηριστής spinthiristís |
| Română | bujie |
| Tiếng Việt | bu-gi, bougie |
| עברית | מצת matsát |
Talk about this word "spark plug." Wiktionary, via Micwyn, micwyn.com/word/spark%20plug. Accessed 6 Nov. 2026. spark plug. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/spark%20plug "spark plug." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/spark%20plug.Cite this
@misc{spark_plug_2026,
title = {spark plug},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/spark%20plug},
urldate = {2026-11-06}
}
