In Octocorallia, a rounded or flattened elongate or membraneous coenenchymal expansion growing over or into the substrate and peripherally producing new polyps.
(basal) In hydroids, a tube of perisarc and the tissues inside attached to and growing across a substrate and, in many older colonies, uniting the erect components.
(terminal) One which arises from, or near to, the distal region of a hydroid colony.

Alternative forms for stolon : stolonial, stolonic, stolons.