What is the meaning of Hydroidea?

Showing "Hydroidea" (corrected from "Hydroideas") | add "Hydroideas" definition

(n.pl.) An extensive order of Hydrozoa or Acalephae.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). Hydroidea. Retrieved September 22, 2026, from http://smartdefine.org/hydroidea/definitions/2018067
ChicagoWebster's. 2011. "Hydroidea" http://smartdefine.org/hydroidea/definitions/2018067 (accessed September 22, 2026).
HarvardWebster's 2011, Hydroidea, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/hydroidea/definitions/2018067>.
MLAWebster's. "Hydroidea" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/hydroidea/definitions/2018067>