Wiktionary
n. Any of several types of engine having cylinders containing reciprocating pistons, in which a crankshaft is turned by pistons moving up and down within cylinders
Usage examples of "piston engine".
The big piston engine of the A-1 responded smoothly and the needle on the airspeed indicator slid up to 140 knots.
Furthermore, for maximum efficiency operating speeds and temperatures whole orders of magnitude greater than the piston engine were needed.
In 1687 he moved to the University of Marburg, where he invented the first mechanical steam engine and the first piston engine.
The specially modified mufflers on the vehicles could not completely stifle the sound of the exhaust, and the beat of the engines drummed softly across the hard surfaces of the rock like the distant drone of a piston engine aircraft.
After hesitating a few seconds, the prop began to swing around, and the old piston engine sputtered to life.