from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An engine whose crankshaft is turned by pistons moving up and down in a cylinder.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders
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