SUCTION

[noun] [U] - the process by which the removal of air from a space results in a lower pressure in that space, causing liquid, gases or other substances to enter that space or causing two surfaces to stick togetherCylinder vacuum cleaners work entirely by suction.In the hospital, a suction machine was used to clear the child's airways.Once the oil spill has been contained, it can be sucked up into tankers using suction pumps.A suction cup (UK and ANZ also sucker) is a circular piece of rubber which sticks to surfaces when pressed against them.You can stick it on your car window by pushing these suction cups against the glass.