plural of pulmonic valve

plural of retaining valve

plural of Tulpius valve

plural of Eustachian valve

plural of swing check valve

A relief valve set to open at a pressure below that at which a container (such as a boiler) would burst. / (figuratively) Any mechanism offering relief from pressure or tension, e.g. emotionally.

(chiefly historical) An electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube, functioning as a switch, amplifier etc.

(in an internal combustion engine) a valve through which the products of combustion escape from the cylinder to the manifold

A liquid used to lubricate valves in brass instruments.

(mechanics) A valve (as in an internal combustion engine) which consists of a sliding shaft with a disk on the end (the disk being shaped to alternately plug and unplug a matching port) and which is operated by springs and possibly cams interacting with the shaft.