suction

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suction

 [suk´shun]
1. the drawing of a fluid or solid into a space because the pressure inside it is lower than that outside.
2. aspiration of gas or fluid by mechanical means.
post-tussive suction a sucking sound heard over a lung cavity just after a cough.

suc·tion

(sŭk'shŭn),
The act or process of sucking.
See also: aspiration (1), aspiration (2).
[L. sugo, pp. suctus, to suck]

suction

(sŭk′shən)
n.
1. The act or process of sucking.
2. A force that causes a fluid or solid to be drawn into an interior space or to adhere to a surface because of the difference between the external and internal pressures.
tr.v. suc·tioned, suc·tioning, suc·tions
1. To draw away or remove by the force of suction: suction fluid from the lungs.
2. To clean or evacuate (a body cavity, for example) by the force of suction.
adj.
1. Creating suction.
2. Operating or operated by suction.

suction

The removal of a fluid or semifluid substance with a negative pressure device. See Liposuction.

suction

The application of negative pressure so as to withdraw fluid. Suction may be by syringe or mechanical pump and is often applied through a container which acts both as a trap and as a receptacle.

suc·tion

(sŭk'shŭn)
The act or process of sucking.
[L. sugo, pp. suctus, to suck]