from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A pump with a solid piston and valves used to raise a liquid or expel it under pressure.
from the GNU version of the Collaborative International Dictionary of English
- A pump having a solid piston, or plunger, for drawing and forcing a liquid, as water, through the valves; in distinction from a pump having a bucket, or valved piston.
- A pump adapted for delivering water at a considerable height above the pump, or under a considerable pressure; in distinction from one which lifts the water only to the top of the pump or delivers it through a spout. See Illust. of Plunger pump, under plunger.
from The Century Dictionary and Cyclopedia
- n. A pump, of widely varying types, which delivers a liquid under pressure, so as to eject it forcibly: distinguished from a lift-pump, in which the liquid is simply lifted and runs out of the spout. Also called forcing-pump. See pump.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. pump used to force a liquid up and expel it under pressure
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