Definition of medusa

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

Lern More About Medusa

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..
Planoblast :: Planoblast (n.) Any free-swimming gonophore of a hydroid; a hydroid medusa.
Sea Jelly :: Sea jelly () A medusa, or jellyfish..
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..
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..
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..
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..
Craspedota :: Craspedota (n. pl.) The hydroid or naked-eyed medusae. See Hydroidea.
Hydromedusae :: Hydromedusae (pl. ) of Hydromedus.
Medusae :: Medusae (pl. ) of Medus.
Sea Nettle :: Sea nettle () A jellyfish, or 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..
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..
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.
Manubrium :: Manubrium (n.) The proboscis of a jellyfish; -- called also hypostoma. See Illust. of Hydromedusa.
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..
Velarium :: Velarium (n.) The marginal membrane of certain medusae belonging to the Discophora.
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..
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