trifurcate

trifurcate
    v 1: divide into three; "The road trifurcates at the bridge"
    

Trifurcate \Tri*fur"cate\, Trifurcated \Tri*fur"ca*ted\, a. [L.
   trifurcus; tri- (see {Tri-}) + furca fork.]
   Having three branches or forks; trichotomous.
   [1913 Webster]
    

54 Moby Thesaurus words for "trifurcate":
      V-shaped, Y-shaped, arboreal, arborescent, arboriform, biforked,
      bifurcate, bifurcated, branched, branching, branchlike, crotched,
      deltoid, dendriform, dendritic, forked, forking, forklike, furcate,
      pronged, ramous, three-cornered, three-dimensional, three-footed,
      three-pronged, three-sided, tree-shaped, treelike, triangular,
      triangulate, triarch, trichotomous, tricorn, tricornered,
      tricuspid, trident, tridental, tridentlike, trifid, triflorate,
      triflorous, trifurcated, trigonal, trigonoid, trigrammatic,
      trihedral, trilateral, trimerous, triparted, tripartite, tripodic,
      triquetral, triquetrous, trisected