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spark plug

noun
🔊/ˈspɑːk plʌɡ/
🔊/ˈspɑːrk plʌɡ/
(also plug)
(British English also sparking plug)
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  1. a part in a car engine that produces a spark (= a flash of electricity) which makes the fuel burn and starts the engine火花塞Topics Transport by car or lorryc2