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)