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We found 45 dictionaries with English definitions that include the word hydra:
Click on the first link on a line below to go directly to a page where "hydra" is defined.

General (33 matching dictionaries)

1. Hydra: Merriam-Webster.com [home, info]
2. Hydra, Hydra, hydra: Oxford Learner's Dictionaries [home, info]
3. Hydra, hydra: American Heritage Dictionary of the English Language [home, info]
4. hydra: Collins English Dictionary [home, info]
5. Hydra, hydra: Vocabulary.com [home, info]
6. hydra: Macmillan Dictionary [home, info]
7. Hydra, hydra: Wordnik [home, info]
8. hydra: Cambridge Advanced Learner's Dictionary [home, info]
9. hydra: Wiktionary [home, info]
10. Hydra: Webster's New World College Dictionary, 4th Ed. [home, info]
11. hydra: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. hydra: Infoplease Dictionary [home, info]
13. hydra: Dictionary.com [home, info]
14. hydra: Online Etymology Dictionary [home, info]
15. Hydra, hydra: UltraLingua English Dictionary [home, info]
16. H.Y.D.R.A, HYDRA (comics), HYDRA, Hydra (Dungeons & Dragons), Hydra (Marvel Comics), Hydra (Otep album), Hydra (Toto album), Hydra (Within Temptation album), Hydra (album), Hydra (association), Hydra (band), Hydra (boat), Hydra (chess), Hydra (comics), Hydra (constellation), Hydra (disambiguation), Hydra (film), Hydra (genus), Hydra (island), Hydra (moon), Hydra (mythology), Hydra (operating system), Hydra (ship), Hydra (skater), Hydra (software), Hydra (video game), Hydra, The Hydra: Wikipedia, the Free Encyclopedia [home, info]
17. Hydra: Online Plain Text English Dictionary [home, info]
18. hydra: Webster's Revised Unabridged, 1913 Edition [home, info]
19. hydra: Rhymezone [home, info]
20. Hydra: AllWords.com Multi-Lingual Dictionary [home, info]
21. hydra: Webster's 1828 Dictionary [home, info]
22. hydra: Hutchinson's Dictionary of Difficult Words [home, info]
23. Hydra: Encarta® Online Encyclopedia, North American Edition [home, info]
24. Hydra (Astronomy), Hydra (Legend): 1911 edition of the Encyclopedia Britannica [home, info]
25. hydra: Free Dictionary [home, info]
26. hydra: Hutchinson Dictionaries [home, info]
27. hydra: Mnemonic Dictionary [home, info]
28. hydra: WordNet 1.7 Vocabulary Helper [home, info]
29. Hydra, hydra: LookWAYup Translating Dictionary/Thesaurus [home, info]
30. Hydra: Dictionary/thesaurus [home, info]
31. Hydra: Dictionary of Phrase and Fable (1898) [home, info]

Art (4 matching dictionaries)

32. hydra: Global Glossary [home, info]
33. Hydra, hydra: An Etymological Dictionary of Classical Mythology [home, info]
34. hydra-: A Cross Reference of Latin and Greek Elements [home, info]
35. Hydra: Natural Magick [home, info]

Computing (1 matching dictionary)

36. Hydra (comics), Hydra (disambiguation), hydra: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

37. Hydra: Medical Dictionary [home, info]
38. Hydra: online medical dictionary [home, info]

Miscellaneous (3 matching dictionaries)

39. HYDRA: Acronym Finder [home, info]
40. hydra: A Word A Day [home, info]
41. HYDRA: AbbreviationZ [home, info]

Science (1 matching dictionary)

42. Hydra: Fishkeeping glossary [home, info]

Slang (1 matching dictionary)

43. hydra: Urban Dictionary [home, info]

(Note: See hydras for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (hydra) ▸ noun:  small tubular solitary freshwater hydrozoan polyp ▸ noun:  trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality ("We may be facing a hydra that defies any easy solution") ▸ noun:  a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer ▸ noun:  (Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones ("Hydra was slain by Hercules") ▸ Also see hydras ▸ Word origin ▸ Words similar to hydra ▸ Usage examples for hydra ▸ Idioms related to hydra (New!) ▸ Popular adjectives describing hydra ▸ Words that often appear near hydra ▸ Rhymes of hydra ▸ Invented words related to hydra