Sclerobase
Scler´o`base
n. 1. (Zool.) The calcareous or hornlike coral forming the central stem or axis of most compound alcyonarians; - called also foot secretion. See Illust. under Gorgoniacea, and Cœnenchyma.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.