'Hydrocorallia' definitions:

Definition of 'Hydrocorallia'

From: GCIDE

Hydrocorallia \Hy`dro*co*ral"li*a\, n. pl. [NL. See Hydra, and Coral.] (Zool.) A division of Hydroidea, including those genera that secrete a stony coral, as Millepora and Stylaster. Two forms of zooids in life project from small pores in the coral and resemble those of other hydroids. See Millepora. [1913 Webster]