Pump \Pump\, n. [Akin to D. pomp, G. pumpe, F. pompe; of unknown
   origin.]
   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.
   [1913 Webster]

   Note: for various kinds of pumps, see Air pump, Chain
         pump, and Force pump; also, under Lifting,
         Plunger, Rotary, etc.
         [1913 Webster]

   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 dale. See Dale.

   Pump gear, the apparatus belonging to a pump. --Totten.

   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.
      [1913 Webster]