Hydroid
Pronunciation : Hy"droid
Part of Speech : a.
Etymology : [Hydra + -oid.] (Zo?l.)
Definition : Defn: Related to, or resembling, the hydra; of or pertaining to the Hydroidea. -- n.
Defn: One of the Hydroideas.
Source : Webster's Unabridged Dictionary, 1913