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Wankel engine

noun
1.
an internal-combustion rotary engine that utilizes a triangular rotor that revolves in a chamber (rather than a conventional piston that moves up and down in a cylinder): it has fewer moving parts and is generally smaller and lighter for a given horsepower.
Also called Wan·kel.
Origin
named after F. Wankel
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for wankel-engine

Wankel engine

/ˈwæŋkəl/
noun
1.
a type of four-stroke internal-combustion engine without reciprocating parts. It consists of one or more approximately elliptical combustion chambers within which a curved triangular-shaped piston rotates, by the explosion of compressed gas, dividing the combustion chamber into three gastight sections
Word Origin
C20: named after Felix Wankel (1902–88), German engineer who invented it
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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