What is 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 called?

medusoid — 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. (Webster's 1913.)