four-stroke engine
English Thesaurus
1. an internal-combustion engine in which an explosive mixture is drawn into the cylinder on the first stroke and is compressed and ignited on the second stroke; work is done on the third stroke and the products of combustion are exhausted on the fourth stroke (noun.artifact)
| hypernym | : | ice, internal-combustion engine, |
| definition | : | 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 (noun.artifact) |
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