Definition of medusa

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Medusa (n.) Any free swimming acaleph; a jellyfish.

Lern More About Medusa

Gymnophthalmata :: Gymnophthalmata (n. pl.) A group of acalephs, including the naked-eyed medusae; the hydromedusae. Most of them are known to be the free-swimming progeny (gonophores) of hydroids..
Blubber :: Blubber (n.) A large sea nettle or medusa.
Rhizostomata :: Rhizostomata (n. pl.) A suborder of Medusae which includes very large species without marginal tentacles, but having large mouth lobes closely united at the edges. See Illust. in Appendix..
Rhopalium :: Rhopalium (n.) One of the marginal sensory bodies of medusae belonging to the Discophora.
Planoblast :: Planoblast (n.) Any free-swimming gonophore of a hydroid; a hydroid medusa.
Polypomedusae :: Polypomedusae (n. pl.) Same as Hydrozoa.
Pegasus :: Pegasus (n.) A winged horse fabled to have sprung from the body of Medusa when she was slain. He is noted for causing, with a blow of his hoof, Hippocrene, the inspiring fountain of the Muses, to spring from Mount Helicon. On this account he is, in modern times, associated with the Muses, and with ideas of poetic inspiration..
Nectocalyx :: Nectocalyx (n.) The swimming bell or umbrella of a jellyfish of medusa.
Ephyra :: Ephyra (n.) A stage in the development of discophorous medusae, when they first begin to swim about after being detached from the strobila. See Strobila..
Scapulet :: Scapulet (n.) A secondary mouth fold developed at the base of each of the armlike lobes of the manubrium of many rhizostome medusae. See Illustration in Appendix.
Lithocyst :: Lithocyst (n.) A sac containing small, calcareous concretions (otoliths). They are found in many Medusae, and other invertebrates, and are supposed to be auditory organs..
Jellyfish :: "Jellyfish (n.) Any one of the acalephs, esp. one of the larger species, having a jellylike appearance. See Medusa..
Velarium :: Velarium (n.) The marginal membrane of certain medusae belonging to the Discophora.
Velum :: Velum (n.) The circular membrane that partially incloses the space beneath the umbrella of hydroid medusae.
Perseus :: Perseus (n.) A Grecian legendary hero, son of Jupiter and Danae, who slew the Gorgon Medusa..
Hydromedusa :: Hydromedusa (n.) Any medusa or jellyfish which is produced by budding from a hydroid. They are called also Craspedota, and naked-eyed medusae..
Gonophore :: Gonophore (n.) A sexual zooid produced as a medusoid bud upon a hydroid, sometimes becoming a free hydromedusa, sometimes remaining attached. See Hydroidea, and Illusts. of Athecata, Campanularian, and Gonosome..
Gorgon :: Gorgon (n.) One of three fabled sisters, Stheno, Euryale, and Medusa, with snaky hair and of terrific aspect, the sight of whom turned the beholder to stone. The name is particularly given to Medusa..
Manubrium :: Manubrium (n.) The proboscis of a jellyfish; -- called also hypostoma. See Illust. of Hydromedusa.
Acalephae :: Acalephae (n. pl.) A group of Coelenterata, including the Medusae or jellyfishes, and hydroids; -- so called from the stinging power they possess. Sometimes called sea nettles..
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