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Noun: sparkplug wrench
  1. A wrench for removing or tightening spark plugs into the cylinder head of an internal combustion engine
Noun: spark plug  spaa(r)k plúg
  1. Electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark
    - sparking plug, plug

Derived forms: spark plugs

Type of: electrical device, spanner [Brit], wrench

Part of: ignition, ignition system

Encyclopedia: Spark plug