veretillum

from The Century Dictionary.

• noun The typical genus of Veretillidæ, having the upper portion of the colony short and clubshaped, with the polypites clustered around the circumference. V. cynomorium is an example.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) Any one of numerous species of club-shaped, compound Alcyonaria belonging to Veretillum and allied genera, of the tribe Pennatulacea. The whole colony can move about as if it were a simple animal.