1) Cnidarian 2) Coelenterate 
• (a.) Like a medusa; having the fundamental structure of a medusa, but without a locomotive disk; -- said of the sessile gonophores of hydroids. • (n.) A sessile gonophore. See Illust. under Gonosome.
Me·du'soid adjective [ Medusa + -oid .] (Zoology) Like a medusa; having the fundamental structure of a medusa, but without a locomotive disk; -- said of the sessile gonophores of hydroids. -- noun A sessile gonophore. See Illust. under Gonosome
[adj] - relating to or resembling a medusa
adjective relating to or resembling a medusa