'Medusoid' definitions:

Definition of 'medusoid'

From: WordNet
adjective
Relating to or resembling a medusa
noun
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 [syn: medusa, medusoid, medusan]

Definition of 'Medusoid'

From: GCIDE
  • Medusoid \Me*du"soid\, a. [Medusa + -oid.] (Zool.) 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. [1913 Webster]