a. [ Gr. de`ndron tree + -form. ] Resembling in structure a tree or shrub; having a branching shape.
Syn. -- arboreal, arboreous, arborescent, arboresque, arboriform, dendroid, dendroidal, treelike, tree-shaped. [ 1913 Webster +PJC ]

n. [ Gr. dendri`ths, fem. dendri^tis, of a tree, fr. de`ndron a tree: cf. F. dendrite. ] (Min.) A stone or mineral on or in which are branching figures resembling shrubs or trees, produced by a foreign mineral, usually an oxide of manganese, as in the moss agate; also, a crystallized mineral having an arborescent form, e. g., gold or silver; an arborization.

{ } a. Pertaining to a dendrite, or to arborescent crystallization; having a form resembling a shrub or tree; arborescent. [ 1913 Webster ]