from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An engine, such as an automotive gasoline piston engine or a diesel, in which fuel is burned within the engine proper rather than in an external furnace, as in a steam engine.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative form of internal combustion engine.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
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