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hydra

Syllabification: (hy·dra)
Pronunciation: /ˈhīdrə/

Definition of hydra

noun

  • a minute freshwater coelenterate with a stalklike tubular body and a ring of tentacles around the mouth.
    • Genus Hydra, class Hydrozoa

Origin:

via Latin from Greek hudra 'water snake' (see Hydra), named by Linnaeus because, if cut into pieces, each section can grow into a whole animal

hydra in other Oxford dictionaries

Definition of hydra in the British & World English dictionary