Tri*cus"pid (?), a. [L. tricuspis, -idis; tri- (see Tri-) + cuspis a point: cf. F. tricuspide.]
Having three cusps, or points; tricuspidate; as, a tricuspid molar.
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.
© Webster 1913.