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We found 41 dictionaries with English definitions that include the word castor:
Click on the first link on a line below to go directly to a page where "castor" is defined.

General dictionaries General (34 matching dictionaries)
  1. Castor, castor: Merriam-Webster.com [home, info]
  2. Castor, Castor, castor: Oxford Learner's Dictionaries [home, info]
  3. Castor, castor, castor: American Heritage Dictionary of the English Language [home, info]
  4. castor: Collins English Dictionary [home, info]
  5. Castor, castor: Vocabulary.com [home, info]
  6. castor: Macmillan Dictionary [home, info]
  7. Castor, castor: Wordnik [home, info]
  8. castor: Cambridge Advanced Learner's Dictionary [home, info]
  9. castor: Wiktionary [home, info]
  10. castor: Webster's New World College Dictionary, 4th Ed. [home, info]
  11. Castor, castor: The Wordsmyth English Dictionary-Thesaurus [home, info]
  12. castor: Infoplease Dictionary [home, info]
  13. Castor: Dictionary.com [home, info]
  14. castor: Online Etymology Dictionary [home, info]
  15. Castor, castor: UltraLingua English Dictionary [home, info]
  16. Castor (band), Castor (disambiguation), Castor (framework), Castor (genus), Castor (mountain), Castor (mythology), Castor (rocket stage), Castor (star), Castor: Wikipedia, the Free Encyclopedia [home, info]
  17. Castor: Online Plain Text English Dictionary [home, info]
  18. castor: Webster's Revised Unabridged, 1913 Edition [home, info]
  19. Castor: Rhymezone [home, info]
  20. Castor, castor, castor (m): AllWords.com Multi-Lingual Dictionary [home, info]
  21. castor: Webster's 1828 Dictionary [home, info]
  22. CASTOR: Stammtisch Beau Fleuve Acronyms [home, info]
  23. castor: All About Homonyms [home, info]
  24. castor: Hutchinson's Dictionary of Difficult Words [home, info]
  25. Castor: Dictionary of Phrase and Fable (1898) [home, info]
  26. Castor: 1911 edition of the Encyclopedia Britannica [home, info]
  27. castor: Free Dictionary [home, info]
  28. castor: Hutchinson Dictionaries [home, info]
  29. castor: Mnemonic Dictionary [home, info]
  30. castor: WordNet 1.7 Vocabulary Helper [home, info]
  31. Castor, castor: LookWAYup Translating Dictionary/Thesaurus [home, info]
  32. Castor: Dictionary/thesaurus [home, info]

Art dictionaries Art (1 matching dictionary)
  1. CASTOR: Epicurus.com Wine Glossary [home, info]

Computing dictionaries Computing (1 matching dictionary)
  1. Castor (genus), Castor (mythology), Castor (zoology), Castor: Encyclopedia [home, info]

Medicine dictionaries Medicine (1 matching dictionary)
  1. Castor (genus), Castor (zoology), castor: Medical dictionary [home, info]

Miscellaneous dictionaries Miscellaneous (1 matching dictionary)
  1. CASTOR: Acronym Finder [home, info]

Science dictionaries Science (1 matching dictionary)
  1. Castor: Extragalactic Astronomy [home, info]

Slang dictionaries Slang (1 matching dictionary)
  1. castor: Urban Dictionary [home, info]

Tech dictionaries Tech (1 matching dictionary)
  1. Castor: AUTOMOTIVE TERMS [home, info]

(Note: See castors for more definitions.)

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (Castor)

noun:  type genus of the Castoridae: beavers
noun:  a multiple star with 6 components; second brightest in Gemini; close to Pollux
noun:  a hat made of beaver fur or similar material
noun:  a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable
noun:  a shaker with a perforated top for sprinkling powdered sugar
name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #5833)

▸ Also see castors
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Phrases that include castor:   castor oil, castor canadensis, castor fiber, dry castor, castor oil plants, more...

Words similar to castor:   beaver, caster, alpha geminorum, genus castor, more...

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