Source : Webster's Revised Unabridged Dictionary (1913)

Arboriform \Ar*bor"i*form\, a.
   Treelike in shape.

Source : WordNet®

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