dendrite

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.