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Definition of Hydrotheca
1. n. One of the calicles which, in some Hydroidea (Thecaphora), protect the hydrants. See Illust. of Hydroidea, and Campanularian.
Definition of Hydrotheca
1. Noun. (zoology) One of the calicles that protect the hydrants in certain Hydroidea (Thecaphora). ¹
¹ Source: wiktionary.com
Medical Definition of Hydrotheca
1.
Origin: NL, fr. E. Hydra + Gr. A box.