Found 2 items, similar to Hydroid.
English → English (WordNet) Definition: hydroid hydroid n : colonial coelenterates having the polyp phase dominant [syn: hydrozoan]
English → English (gcide) Definition: Hydroid Hydroid \Hy"droid\, a. [Hydra + -oid.] (Zo["o]l.) Related to, or resembling, the hydra; of or pertaining to the Hydroidea. -- n. One of the Hydroideas. [1913 Webster]