Definition of spark plug in English:
A device for firing the explosive mixture in an internal-combustion engine.
- Then, without the spark plug in place, pull the starter cord slowly, distributing the oil through the cylinder.
- Sedlack first tried to disable a snowmobile by pulling out a spark plug.
- He looked over at the battery and saw that the cap on a spark plug was loose.
Definition of spark plug in:
- US English dictionary
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