Category:Hydrotheca

Hy`dro*the"ca, n.; pl. L. Hydrothecæ, E. Hydrothecas. Etym: [NL., fr. E. hydra + Gr. (Zoöl.)

Defn: One of the calicles which, in some Hydroidea (Thecaphora), protect the hydrants. See Illust. of Hydroidea, and Campanularian.