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spark plug
spark plug definition
☆ spark plug
- an electrical device threaded into the cylinder of an internal-combustion engine to ignite the fuel mixture by producing timed sparks between electrodes
- Informal a person or thing that inspires, activates, or advances something
Related Forms:
- sparkplug spark′·plug′ transitive verb sparkplugged -·plugged′, sparkplugging -·plug′·ging
Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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