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triple expansion engine

noun

  1. (formerly) a steam engine in which the steam is expanded in three stages in cylinders of increasing diameter to accommodate the increasing volume of the steam
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Example Sentences

A triple expansion engine has three cylinders using the steam expansively in each one.

How does a triple-expansion engine differ from an ordinary steam-engine?

The ship was driven by steam, the triple-expansion engine being 500-horse power and the rate of speed twenty-five miles an hour.

In the triple expansion-engine the steam expands from the second cylinder into a third, still larger.

The triple-expansion engine is cutting down ocean freight, making distance of no account.

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