Hydroidea

Hydroidea is a genus of flowering plants in the daisy family, Asteraceae. ...
Found on http://en.wikipedia.org/wiki/Hydroidea

Hydroidea

• (n. pl.) An extensive order of Hydrozoa or Acalephae.
Found on http://thinkexist.com/dictionary/meaning/hydroidea/

hydroidea

<zoology> An extensive order of Hydrozoa or Acalephae. ... Alternative forms: Hydroida. ... This order includes the hydras and the free-swimming hydromedusae, together with a great variety of marine attached hydroids, many of which grow up into large, elegantly branched forms, consisting of a vast number of zooids (hydranths, gonophores, etc)...
Found on http://www.encyclo.co.uk/local/20973

Hydroidea

Hy·droi'de·a noun plural [ New Latin See Hydra , and -oid .] (Zoology) An extensive order of Hydrozoa or Acalephæ. [ Written also Hydroida .] » This order includes the hydras and the free-swimming hydromedusæ, together with a great variety of marine attached...
Found on http://www.encyclo.co.uk/webster/H/76
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