Tri-cŭs'pid, a.

a. [Lat. tricuspis, tricuspidis, from tri, tris, three, thrice, and cuspis, cuspidis, a point; Fr. tricuspide, tricuspidal.] Having three cusps or points; as, tricuspid molars.

Tricuspid valves (Anat.), three triangular valvular duplications formed by the inner membrane of the right cavities of the heart, around the orifice by which the auricle communicates with the ventricle.

Dunglison.