single-acting

[sing-guh l-ak-ting]
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adjective

(of a reciprocating engine, pump, etc.) having pistons accomplishing work only in one direction.Compare double-acting(def 1).

Origin of single-acting

First recorded in 1815–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for single-acting

single-acting

adjective

(of a reciprocating engine or pump) having a piston or pistons that are pressurized on one side onlyCompare double-acting (def. 1)
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