hydrotheca definition

  • noun:
    • among the calicles that shield the hydrants in some Hydroidea (Thecaphora).
    • one of many calicles which, in some Hydroidea (Thecaphora), shield the hydrants. See Illust. of hydroidea, and campanularian.
    • In zoology, a little chitinous cup where each polypite for the Sertularidia and Campanularida is protected; a calycle. See cut-under Campanularia.

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