double-acting

[ duhb-uhl-ak-ting ]

adjective

1. (of a reciprocating engine, pump, etc.) having pistons accomplishing work in both directions, fluid being admitted alternately to opposite ends of the cylinders. Compare single-acting.
2. (of a hinge of a door or the like) permitting movement in either direction from the normal, or closed, position.
3. having twice the usual effectiveness, strength, use, etc.

double-acting

adjective

1. (of a reciprocating engine or pump) having a piston or pistons that are pressurized alternately on opposite sides Compare single-acting
2. (of a hinge, door, etc) having complementary actions in opposed directions

Word History and Origins

Origin of double-acting¹

First recorded in 1835–45

Example Sentences

He worked at Dolcoath the 63-inch cylinder double-acting engine, upon Boulton and Watt's plan.

From Project Gutenberg

A table mounted with one blow-pipe made on this plan, and worked by a double-acting bellows, is recommended for students' use.

From Project Gutenberg

Some double-acting cylinders have a piston rod half the area of the piston.

From Project Gutenberg

The Double-acting Force Pump is in principle a double plunger pump.

From Project Gutenberg

This company substituted a double-acting pump early in 1910.

From Project Gutenberg