hydra
/ˈhaɪ̯dɹə/ noun, proper noun
Forms hydras hydrae hydræ
- noun (fantasy) A dragon-like creature with many heads and the ability to regrow them when maimed.
- noun (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.
- noun (figurative) A complex, multifarious problem or situation that cannot be easily and rapidly solved.
- proper noun (Greek mythology) A mythological serpent with many heads, slain by Hercules as one of his twelve labours.
- proper noun (astronomy) A spring constellation of the northern sky, said to resemble a serpent. It lies just south of the zodiac and contains the star Alphard.
- proper noun (astronomy) One of Pluto's moons.
- proper noun One of the Saronic Islands in the Aegean Sea.
- proper noun (geography) A commune in Algiers Province, Algeria.
Synonyms
Lernaean Hydra Xiangliu Xiangyao Pluto II S 2005 P 1 Pluto II Hydra Snake
Etymology
After the Hydra, from Greek mythology, which grew two new heads every time one of its heads was cut off. The biology sense alludes to the budding method of asexual reproduction that the hydra practices, similar to growing new heads. The figurative sense refers to how the creature could not be killed by a swift, decisive solution (in contrast to a Gordian knot).
From Latin Hydra, the mythical serpent, originally from Ancient Greek ὕδρα (húdra), from Proto-Indo-European *údreh₂ (“aquatic”). Doublet of otter.
Webster’s 1913
- noun A serpent or monster in the lake or marsh of Lerna, in the Peloponnesus, represented as having many heads, one of which, when cut off, was immediately succeeded by two others, unless the wound was cauterized. It was slain by Hercules. Hence, a terrible monster.
- noun Hence: A multifarious evil, or an evil having many sources; not to be overcome by a single effort.
Etymology [L. hydra, Gr. "y`dra; akin to "y`dwr water. See Otter the animal, Water.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “hydra”, CC BY-SA 4.0. Details