Hydromedusa :: Hydromedusa (n.) Any medusa or jellyfish which is produced by budding from a hydroid. They are called also Craspedota, and naked-eyed medusae..
Medusa :: Medusa (n.) The Gorgon; or one of the Gorgons whose hair was changed into serpents, after which all who looked upon her were turned into stone..
Medusa :: Medusa (n.) Any free swimming acaleph; a jellyfish.
Medusiform :: Medusiform (a.) Resembling a medusa in shape or structure.
Medusoid :: Medusoid (a.) Like a medusa; having the fundamental structure of a medusa, but without a locomotive disk; -- said of the sessile gonophores of hydroids..
Medusoid :: Medusoid (n.) A sessile gonophore. See Illust. under Gonosome.
Scyphomeduse :: Scyphomeduse (n. pl.) Same as Acraspeda, or Discophora..
Trachymedusae :: Trachymedusae (n. pl.) A division of acalephs in which the development is direct from the eggs, without a hydroid stage. Some of the species are parasitic on other medusae..