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Hydra properNoun

  /ˈhaɪ̯dɹə/ , [ˈhaɪ̯dɹə] , [ˈhaɪ̯d͡ʒɹə]
  • (astronomy) One of Pluto's moons.
 Hidra, Hydra

hydra noun

  /ˈhaɪdɹə/
  • (biology) Any of several small freshwater polyps of the genus Hydra and related genera, having a naked cylindrical body and an oral opening surrounded by tentacles.
 hidra
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