<anatomy> A term used to describe anyone of the main 4 valves of the heart: tricuspid, mitral, aortic or pulmonic valves.

Mitral valve separates left atrium and left ventricle, pulmonic valve separates pulmonary vein and left atrium, tricuspid valve separates right atrium and right ventricle, aortic valve separates left ventricle and the aorta

(27 Sep 1997)