suction (
http://definr.com/suction)
n 1: a force over an area produced by a pressure difference
2: the act of sucking [syn:
sucking,
suck]
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 by the force of suction, as of a body cavity;
"suction the uterus in an abortion"