four-stroke

Adjective

 * 1) Of or relating to a design of internal combustion engine in which the pistons perform four strokes per engine cycle: intake, compression, power, exhaust.
 * This motorbike has a four-stroke engine.

Derived terms

 * four-stroke engine (translation hub)

Noun

 * 1) A four-stroke engine.
 * 2) A vehicle or machine powered by a four-stroke engine.