piston valve
noun
1A valve in a piston, as in that of a piston pump.
2A valve consisting of a small piston sliding back and forth in a tube, opening or closing a hole or holes in the tube wall, as alongside the cylinder of a steam engine or in a brass musical instrument.
Origin
Mid 18th century; earliest use found in Martin Clare (d. 1751).
- neutral
- neutral axis
- neutral beam
- neutral blue
- neutral buoyancy
- neutral corner
- neutral current
- neutral-density
- neutral density filter
- neutral-dyeing
- neutralino
- neutralise
- neutralism
- unbridle
- unbridled
- unbroken
- unbrokenly
- father confessor
- father figure
- fatherhood
- father-in-law
- fatherland
- fatherless
- fatherlessness
- fatherlike