one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles
<noun.animal> [ adj ]
relating to or resembling a medusa
<adj.pert>
Medusoid \Me*du"soid\, a. [Medusa + -oid.] (Zo["o]l.) 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}.