hydroid

2 definitions found

hydroid - Collaborative International Dictionary of English v.0.48 :

  Hydroid \Hy"droid\, a. [Hydra + -oid.] (Zool.)
     Related to, or resembling, the hydra; of or pertaining to the
     Hydroidea. -- n. One of the Hydroideas.
     [1913 Webster]

hydroid - WordNet (r) 2.1 (2005) :

  hydroid
      n 1: colonial coelenterates having the polyp phase dominant
           [syn: hydrozoan, hydroid]