[dash-pot] 
| a device for cushioning, damping, or reversing the motion of a piece of machinery, consisting of a cylinder in which a piston operates to create a pressure or vacuum on an enclosed gas or to force a fluid in or out of the chamber through narrow openings. |
| dash·pot (dāsh'pŏt') n. A device consisting of a piston that moves within a cylinder containing oil, used to dampen and control motion. |
