
• (a.) Designating, or pertaining to, any engine (called an Internal-combustion engine) in which the heat or pressure energy necessary to produce motion is developed in the engine cylinder, as by the explosion of a gas, and not in a separate chamber, as in a steam-engine boiler. The gas used may be a fixed gas, or one derived from alcohol, eth...
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In·ter'nal-com·bus'tion adjective (Machinery) Designating, or pertaining to, any engine (called an
Internal-combustion engine ) in which the heat or pressure energy necessary to produce motion is developed in the engine cylinder, as by the explosion of a gas, and not in a separate chamber, ...
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http://www.encyclo.co.uk/webster/I/81

[
n] - the combustion of fuel inside a cylinder (as in an internal-combustion engine)
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http://www.webdictionary.co.uk/definition.php?query=internal%20combustion

of or pertaining to an internal-combustion engine.
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https://www.infoplease.com/dictionary/internal-combustion
No exact match found.