The larger medusæ belong to the Discophora, and are sometimes called
covered-eyed medusæ; others, known as naked-eyed medusæ, belong to the
Hydroidea, and are usually developed by budding from hydroids. See
Discophora, Hydroidea, and Hydromedusa.
Medusa bud (Zoöl.), one of the buds of a hydroid, destined to develop
into a gonophore or medusa. See Athecata, and Gonotheca. -- Medusa's
head. (a) (Zoöl.) An astrophyton. (b) (Astron.) A cluster of stars in
the constellation Perseus. It contains the bright star Algol.
Me*du"si*an (?), n. (Zoöl.) A medusa.
Me*du"si*form (?), a. [Medusa + -form.] (Zoöl.) Resembling a medusa in
shape or structure.
Me*du"soid (?), a. [Medusa + -oid.] (Zoöl.) 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.