\Tri*cus"pid\, a. [L. tricuspis, -idis; tri- (see
{Tri-}) + cuspis a point: cf. F. tricuspide.]
1. Having three cusps, or points; tricuspidate; as, a
   tricuspid molar.
2. (Anat.) Of or pertaining to the tricuspid valves; as,
   tricuspid obstruction.
{Tricuspid valve} (Anat.), the valve, consisting of three
   triangular membranous flaps, at the opening of the right
   auricle into the right ventricle in the heart of most
   mammals; -- sometimes called the {tricuspid valves}, each
   flap being regarded as a valve.