D defs.my
Entry 1 sense Webster, 1913

Force pump

/fôrs pŭmp/ · Force· pump · IPA
01 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…
  1. 1.
    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.(Mach.)