Definitions for "Piston"
A sliding piece which either is moved by, or moves against, fluid pressure. It usually consists of a short cylinder fitting within a cylindrical vessel along which it moves, back and forth. It is used in steam engines to receive motion from the steam, and in pumps to transmit motion to a fluid; also for other purposes.
Pump Module component. Part of the piston/cylinder set.
The head which moves inside the cylinders of a steam locomotive when pressured by steam.
Keywords:  pushes, barista, ram, espresso, rockets
Some larger rockets use a "piston" which pushes the Recovery Device out
Another name for the manual espresso machine. The barista has to operate it himself, by pushing a lever, in order to force the water through the coffee grounds.
The churning motion in the air made by the legs of a bad boy when he is being severely spanked (see "bawl", "buck").
mechanical device that has a plunging or thrusting motion
a device that the Forerunners , or perhaps the machines they left behind, installed within facilities like the Sentinel Wall as "doors" to get from level to level within the multi-tiered contruct
Keywords:  primer
United States neoclassical composer (1894-1976)
Keywords:  plunger, slang, term, see
Slang term - see "plunger".
a crucial part of the internal mechanism of a shock absorber