(anatomy) A valvular fold at the end of the pyloric canal which lets food pass from the stomach to the duodenum.

plural of needle valve

A slide valve with a cup-like cavity in its face, through which exhaust steam passes.

A valve fitted in the bottom of a ship's fuel, water or ballast tank that allows seawater to enter for the purposes of cleaning and to admit water ballast.

plural of Kingston valve

snifting valve

plural of snifting valve

plural of blow valve

A small valve opening into the atmosphere from the cylinder or condenser of a steam engine, to allow the escape of air when the piston makes a stroke.

(anatomy) The valve that divides the left atrium and left ventricle of the heart.