Anatomy. A membranous fold in an organ or passage of the body (esp. in the heart, arteries, and veins), which automatically closes after the…

A cardiac valve or valve leaflet. Cf. earlier portal, adj. 1. Obsolete. rare.

Having three cusps or points. tricuspid valve n. also tricuspid valves Anatomy the valve consisting of three triangular segments (or, as otherwise…

†(a) either of the two cusps of the left atrioventricular valve (obsolete); (b) the left atrioventricular valve.

The mitral valve. Obsolete.