Genus of freshwater coelenterates (Cnidaria). They are small, solitary and only exist in the polyp form, which is a radially-symmetrical cylinder that is attached to the substratum at one end and has a mouth surrounded by tentacles at the other. They have considerable powers of regeneration and have been used in studies on positional information in morphogenesis.

Dictionary of molecular biology. 2004.


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  • Hydra — may refer to:* Lernaean Hydra, a mythological many headed serpent * hydra , an alternate spelling of the prefix hydro , referring to water. * The internet advertising company Hydra LLC, Hydra Network.It may also refer to:In science* Hydra… …   Wikipedia

  • Hydra — (griechisch: Wasser) steht für: Hydra (Mythologie), ein Wesen der griechischen Mythologie Süßwasserpolypen, Familie Hydridae, nur mit Gattung Hydra, aus dem Stamm der Nesseltiere Hydra von Mallorca, 2003 in Spanien gefundes zweiköpfiges Exemplar… …   Deutsch Wikipedia

  • HYDRA — Primera aparición Strange Tales n.º 135 Creador(es) Stan Lee. Jack Kirby. Editorial Marvel Comics Base de ope …   Wikipedia Español

  • Hydra — Hy dra, n.; pl. E. {Hydras}, L. {Hydr[ae]}. [L. hydra, Gr. y dra; akin to y dwr water. See {Otter} the animal, {Water}.] 1. (Class. Myth.) A serpent or monster in the lake or marsh of Lerna, in the Peloponnesus, represented as having many heads,… …   The Collaborative International Dictionary of English

  • Hydra — {{Hydra}} »Wasserschlange«, ein Ungeheuer, das von Typhon* und Echidna* abstammte und das Hera* voll Zorn auf Herakles in den Sümpfen von Lerna nährte. Herakles aber tötete es, unterstützt von dem tapferen Iolaos* und von Pallas Athene* (Hesiod,… …   Who's who in der antiken Mythologie

  • hydra — ► NOUN ▪ a minute freshwater invertebrate animal with a stalk like tubular body and a ring of tentacles around the mouth. ORIGIN named after the Hydra of Greek mythology, a many headed snake whose heads regrew as they were cut off: the hydra is… …   English terms dictionary

  • hydra — 1835, genus name of a freshwater polyp, from Gk. Hydra, many headed Lernaean water serpent slain by Hercules (this sense is attested in English from late 14c.), from hydor (gen. hydatos) water (see WATER (Cf. water) (n.1)); related to Skt. udrah… …   Etymology dictionary

  • hydra — {{/stl 13}}{{stl 8}}rz. ż Ia, CMc. hydradrze {{/stl 8}}{{stl 20}} {{/stl 20}}{{stl 12}}1. {{/stl 12}}{{stl 7}} w mitologii greckiej: potwór o wielu głowach natychmiast odrastających po ścięciu, pokonany przez Heraklesa {{/stl 7}}{{stl 20}} {{/stl …   Langenscheidt Polski wyjaśnień

  • Hydra — [hī′drə] n. pl. for 3 & 4 Hydras, Hydrae [hī′drē΄] [ME ydre (< OFr < L), ydra < L Hydra < Gr, water serpent, akin to hydōr, WATER] 1. Gr. Myth. the nine headed serpent slain by Hercules as one of his twelve labors: when any one of its …   English World dictionary

  • Hydra — Hydra, s. Hydroidpolypen …   Kleines Konversations-Lexikon

  • Hydra — steht am 8. Dec. im Elenchus nur mit dem Beisatze »Syenae in Aegypto« …   Vollständiges Heiligen-Lexikon

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