from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A rotary internal-combustion engine in which a triangular rotor turning in a specially shaped housing performs the functions allotted to the pistons of a conventional engine, thereby allowing great savings in weight and moving parts.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A rotary internal combustion engine, without pistons, using instead an epitrochoid-shaped housing.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a rotary engine that is a four-stroke internal-combustion engine without reciprocating parts


After Felix Wankel (1902-1988), German engineer.
(American Heritage® Dictionary of the English Language, Fourth Edition)


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