suction

¹suc·tion

noun \ˈsək-shən\

Definition of SUCTION

1

: the act or process of sucking

2

a : the act or process of exerting a force upon a solid, liquid, or gaseous body by reason of reduced air pressure over part of its surface b : force so exerted

3

: the act or process of removing secretions or fluids from hollow or tubular organs or cavities by means of a tube and a device (as a suction pump) that operates on negative pressure