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rotary engine

noun
1.
an engine, as a turbine, in which the impelling fluid produces torque directly rather than by acting upon reciprocating parts.
2.
a revolving radial engine.
Origin of rotary engine
1810-1820
1810-20
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for rotary engine

rotary engine

noun
1.
an internal-combustion engine having radial cylinders that rotate about a fixed crankshaft
2.
an engine, such as a turbine or wankel engine, in which power is transmitted directly to rotating components
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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Word Value for rotary

9
8
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