Definition of medusa

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

Lern More About Medusa

Sea Jelly :: Sea jelly () A medusa, or jellyfish..
Velum :: Velum (n.) The circular membrane that partially incloses the space beneath the umbrella of hydroid 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..
Blubber :: Blubber (n.) A large sea nettle or medusa.
Polypite :: Polypite (n.) Sometimes, the manubrium of a hydroid medusa..
Polypomedusae :: Polypomedusae (n. pl.) Same as Hydrozoa.
Vesiculata :: Vesiculata (n. pl.) The campanularian medusae.
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..
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..
Meconidium :: Meconidium (n.) A kind of gonophore produced by hydroids of the genus Gonothyraea. It has tentacles, and otherwise resembles a free medusa, but remains attached by a pedicel..
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..
Semaeostomata :: Semaeostomata (n. pl.) A division of Discophora having large free mouth lobes. It includes Aurelia, and Pelagia. Called also Semeostoma. See Illustr. under Discophora, and Medusa..
Quarl :: Quarl (n.) A medusa, or jellyfish..
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..
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..
Strobila :: Strobila (n.) A form of the larva of certain Discophora in a state of development succeeding the scyphistoma. The body of the strobila becomes elongated, and subdivides transversely into a series of lobate segments which eventually become ephyrae, or young medusae..
Nectocalyx :: Nectocalyx (n.) The swimming bell or umbrella of a jellyfish of medusa.
Pulmograde :: Pulmograde (a.) Swimming by the expansion and contraction, or lunglike movement, of the body, or of the disk, as do the medusae..
Perseus :: Perseus (n.) A Grecian legendary hero, son of Jupiter and Danae, who slew the Gorgon Medusa..
Medusiform :: Medusiform (a.) Resembling a medusa in shape or structure.
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