A valve in an internal combustion engine mounted alongside the cylinder.
（内燃机的）侧阀，侧置阀
Example sentencesExamples
Three more prototype cars were built, chassis number A3 was the third Aston Martin ever built and is the oldest in existence with a 1.5 litre 11 hp four cylinder side valve.
Gasoline engines with overhead valves are less polluting than those with side valves.
Twenty of these engines had side valves; the remainder were overhead valve engines.