'Suction' definitions:

Definition of 'suction'

(from WordNet)
noun
A force over an area produced by a pressure difference
noun
The act of sucking [syn: sucking, suck, suction]
verb
Remove or draw away by the force of suction; "the doctors had to suction the water from the patient's lungs"
verb
Empty or clean (a body cavity) by the force of suction; "suction the uterus in an abortion"

Definition of 'Suction'

From: GCIDE
  • 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]