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).
- prothalloid
- prothallus
- protheca
- prothesis
- prothetelic
- prothetelous
- prothetely
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- prothonotary warbler
- prothoracic
- prothorax
- prothrombin
- prothrombin time
- prothyl
- prothyron
- prothyrum
- prothysteron
- protiated
- protic