arboriform

from WordNet (r) 3.0 (2006)

arboriform
    adj 1: resembling a tree in form and branching structure;
           "arborescent coral found off the coast of Bermuda";
           "dendriform sponges" [syn: {arboreal}, {arboreous},
           {arborescent}, {arboresque}, {arboriform}, {dendriform},
           {dendroid}, {dendroidal}, {treelike}, {tree-shaped}]

from The Collaborative International Dictionary of English v.0.48

Arboriform \Ar*bor"i*form\, a.
   Treelike in shape.
   [1913 Webster]