'Hydrocauli' definitions:

Definition of 'Hydrocauli'

From: GCIDE

Hydrocaulus \Hy`dro*cau"lus\, n.; pl. Hydrocauli. [NL., fr. Gr. "y`dwr water + ? a stalk.] (Zool.) The hollow stem of a hydroid, either simple or branched. See Illust. of Gymnoblastea and Hydroidea. [1913 Webster]