Hy`dro*the"ca (?), n.; pl. L. Hydrothecae (#), E. Hydrothecas (#). [NL., fr. E. hydra + Gr. a box.] Zool.

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

 

© Webster 1913.

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