Source : Webster's Revised Unabridged Dictionary (1913)

Tricuspidate \Tricus"pid*ate\, a.
   Three-pointed; ending in three points; as, a tricuspidate
   leaf.

Source : WordNet®

tricuspidate
     adj : having three cusps or points (especially a molar tooth);
           "tricuspid molar"; "tricuspid valve" [syn: {tricuspid}]