A disc or short cylinder fitting closely within a tube in which it moves up and down against a liquid or gas, used in an internal-combustion engine to derive motion, or in a pump to impart motion
A core of underwater sediment obtained with a piston core sampler.
The disc or cylindrical part forming the end of a piston, which is attached to the piston rod.
Resembling a piston in action; (of motion) resembling that of a piston.
A pin which secures a piston to its connecting rod, especially in an internal-combustion engine.
A pump having a piston.
The rocking of a loosely fitting piston against the cylinder wall; the noise resulting from this.
A ring on a piston sealing the gap between the piston and the cylinder wall
A rod or crankshaft attached to a piston to drive a wheel or to impart motion
A percussion drill in which the bit is attached to the rod of a piston.
A tube or hollow shaft that moves longitudinally with the piston head in a trunk engine, usually taking the place of the cross-head.
A valve in a piston, as in that of a piston pump.
A wheel or rotating disc carrying at its outer margin one or more pistons.
A piston-driven cylindrical device for taking samples of material from the seabed
An engine, especially in an aircraft, in which power is derived from cylinders and pistons rather than a turbine
Bellows in which the air current is supplied by the action of a piston.
Any material used for filling the space between a piston head and the cylinder within which it moves, so as to prevent steam, air, etc., leaking out.
= piston core sampler.
A whistle in which the pitch of the sound is varied by means of a piston sliding in the tube, shortening or lengthening the vibrating column of air.
A solid cylindrical piston used in a plunger pump.
An underwater core sampler consisting of a long weighted cylinder containing at its lower end a piston attached to the lowering cable, devised so that when the cylinder enters the bottom sediments under its own weight the descent of the piston is arrested, and the resulting partial vacuum inside the cylinder causes the pressure of the water to force it further into the sediment.