piston
121piston rod — a rod communicating the rectilinear motion of a piston to the small end of a connecting rod or elsewhere. [1780 90] * * * …
122piston rod — noun a rod or bar in an engine that connects a piston to a crosshead …
123piston-engine aircraft — aircraft which is powered by a propeller which spins from the force of the piston engine …
124piston engine — noun an engine, especially in an aircraft, in which power is derived from cylinders and pistons rather than a turbine. Derivatives piston engined adjective …
125piston rod — noun a rod or crankshaft attached to a piston to drive a wheel or to impart motion …
126piston ring — noun (C) a circular metal spring used to stop gas or liquid escaping from between a piston and the tube that it moves in …
127piston ring — pis′ton ring n. mac a metal ring, split so it can expand, placed around a piston to ensure a tight fit in the cylinder of an engine • Etymology: 1865–70 …
128piston rod — pis′ton rod n. aum a rod that transmits the motion of a piston in an engine or pump • Etymology: 1780–90 …