plural of side valve

plural of stop valve

plural of valve train

plural of atrioventricular valve

(anatomy) Either of the two valves in the heart, situated between the atria and the ventricles, that prevent backflow from the ventricles into the atria during systole.

plural of escape valve

A valve on a boiler to let the steam escape. / (figuratively) Any psychological mechanism to relieve stress.

(anatomy) The mitral valve.

plural of bicuspid valve

(anatomy) The pulmonary valve.