relief valve
— Noun
– English
~ a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
rectifying valve
— Noun
– English
~ a thermionic tube having two electrodes; used as a rectifier
right atrioventricular valve
— Noun
– English
~ valve with three cusps; situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts