The Collaborative International Dictionary of English v.0.48:
Tricuspidate \Tricus"pid*ate\, a. Three-pointed; ending in three points; as, a tricuspidate leaf. [1913 Webster]WordNet (r) 3.0 (2006):
tricuspidate adj 1: having three cusps or points (especially a molar tooth); "tricuspid molar"; "tricuspid valve" [syn: tricuspid, tricuspidate]