Pump n. An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston. Note: for various kinds of pumps, see Air pump, Chain pump, and Force pump; also, under Lifting, Plunger, Rotary, etc. Circulating pump (Steam Engine), a pump for driving the condensing water through the casing, or tubes, of a surface condenser.
Pump brake. See Pump handle, below.
Pump gear, the apparatus belonging to a pump.
Pump handle, the lever, worked by hand, by which motion is given to the bucket of a pump.
Pump hood, a semicylindrical appendage covering the upper wheel of a chain pump.
Pump rod, the rod to which the bucket of a pump is fastened, and which is attached to the brake or handle; the piston rod.
Pump room, a place or room at a mineral spring where the waters are drawn and drunk. (Eng.)
Pump spear. Same as Pump rod, above.
Pump stock, the stationary part, body, or barrel of a pump.
Pump well. (Naut.) See Well. 
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