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internal combustion engine
noun
Definition of internal combustion engine
: a heat engine in which the combustion that generates the heat takes place inside the engine proper instead of in a furnace
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First Known Use of internal combustion engine
1884
INTERNAL COMBUSTION ENGINE Defined for English Language Learners
internal combustion engine
noun
Definition of internal combustion engine for English Language Learners
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: a type of engine that is used for most vehicles : an engine in which the fuel is burned within engine cylinders
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