valve

Definitions

• A device that controls the flow of a gas or fluid through a pipe.
• A device that admits fuel and air into the cylinder of an internal combustion engine, or one that allows combustion gases to exit.
• (anatomy) One or more membranous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or control the flow in the opposite direction
• One of the leaves of a folding folding-door, or a window-sash.
• (British) A vacuum tube.
• (botany) One of the pieces into which certain fruits naturally separate when they dehisce.
• (botany) A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, such as in the barberry.
• (biology) One of the pieces or divisions of bivalve or multivalve shells.
• (biology) One of the two similar portions of the shell of a diatom.