Dicionário

Hydrocaulus

Webster's Dictionary 1913

Hy′dro‐cau″lus (?), n.; pl.Hydrocauli (#). [NL., fr. Gr. ὕδωρ water + � a stalk.] (Zoöl.) The hollow stem of a hydroid, either simple or branched. See Illust. of Gymnoblastea and Hydroidea.