The DICT Development Group

  Suction \Suc"tion\, n. [L. sugere, suctum, to suck; cf. OF.
     suction. See Suck, v. t.]
     The act or process of sucking; the act of drawing, as fluids,
     by exhausting the air.
     [1913 Webster]
  
     Suction chamber, the chamber of a pump into which the
        suction pipe delivers.
  
     Suction pipe, Suction valve, the induction pipe, and
        induction valve, of a pump, respectively.
  
     Suction pump, the common pump, in which the water is raised
        into the barrel by atmospheric pressure. See Illust. of
        Pump.
        [1913 Webster]

  suction
      n 1: a force over an area produced by a pressure difference
      2: the act of sucking [syn: sucking, suck, suction]
      v 1: remove or draw away by the force of suction; "the doctors
           had to suction the water from the patient's lungs"
      2: empty or clean (a body cavity) by the force of suction;
         "suction the uterus in an abortion"

  32 Moby Thesaurus words for "suction":
     aspiration, bleeding, bloodletting, broaching, cupping, drafting,
     drag, drainage, draining, drawing, emptying, favor, inhalation,
     inhalement, inside track, inspiration, interest, milking,
     phlebotomy, pipetting, pull, pumping, siphoning, sniff, sniffle,
     snuff, snuffle, special favor, suck, sucking, tapping,
     venesection