any engine employing the rectilinear motion of one or more pistons in cylinders.
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Irreparable vs. UnrepairableThe words irreparable and unrepairable are synonyms that mean unable to be fixed. Both irreparable and unrepairable are adjectives (words that modify nouns by describing an aspect of them). Irreparable was first used between the late 1300s to early 1400s. It’s a Middle English word derived from the Latin term, irreparabilis, meaning not able to be recovered. Unrepairable is a related form of the verb …
Origin of reciprocating engine
First recorded in 1815–25
Also called displacement engine, piston engine.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for displacement engine
an engine in which one or more pistons move backwards and forwards inside a cylinder or cylinders
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