Hydrocaulus

1 definition found

From The Collaborative International Dictionary of English v.0.48 [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]