Steam engine | Definition, History, Impact, & Facts | Britannica
https://www.britannica.com/technology/steam-engine
WebDec 3, 2023 · Steam engine, machine using steam power to perform mechanical work through the agency of heat. In a steam engine, hot steam, usually supplied by a boiler, expands under pressure, and part of the heat energy is converted into work. Learn more about steam engines in this article.
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