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We found 31 dictionaries with English definitions that include the word efficacious:
Click on the first link on a line below to go directly to a page where "efficacious" is defined.

General dictionaries General (28 matching dictionaries)
  1. efficacious: Merriam-Webster.com [home, info]
  2. efficacious: Oxford Dictionaries [home, info]
  3. efficacious: American Heritage Dictionary of the English Language [home, info]
  4. efficacious: Collins English Dictionary [home, info]
  5. efficacious: Vocabulary.com [home, info]
  6. efficacious: Macmillan Dictionary [home, info]
  7. Efficacious, efficacious: Wordnik [home, info]
  8. efficacious: Cambridge Advanced Learner's Dictionary [home, info]
  9. efficacious: Wiktionary [home, info]
  10. efficacious: Webster's New World College Dictionary, 4th Ed. [home, info]
  11. efficacious: The Wordsmyth English Dictionary-Thesaurus [home, info]
  12. efficacious: Infoplease Dictionary [home, info]
  13. Efficacious, efficacious: Dictionary.com [home, info]
  14. efficacious: UltraLingua English Dictionary [home, info]
  15. Efficacious: Wikipedia, the Free Encyclopedia [home, info]
  16. Efficacious: Online Plain Text English Dictionary [home, info]
  17. efficacious: Webster's Revised Unabridged, 1913 Edition [home, info]
  18. efficacious: Rhymezone [home, info]
  19. Efficacious: AllWords.com Multi-Lingual Dictionary [home, info]
  20. efficacious: Webster's 1828 Dictionary [home, info]
  21. efficacious: Free Dictionary [home, info]
  22. efficacious: Hutchinson Dictionaries [home, info]
  23. efficacious: Mnemonic Dictionary [home, info]
  24. efficacious: WordNet 1.7 Vocabulary Helper [home, info]
  25. efficacious: LookWAYup Translating Dictionary/Thesaurus [home, info]
  26. efficacious: Dictionary/thesaurus [home, info]

Business dictionaries Business (1 matching dictionary)
  1. efficacious: Legal dictionary [home, info]

Computing dictionaries Computing (1 matching dictionary)
  1. efficacious: Encyclopedia [home, info]

Medicine dictionaries Medicine (1 matching dictionary)
  1. efficacious: Medical dictionary [home, info]

(Note: See efficaciousness for more definitions.)

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (efficacious)

adjective:  marked by qualities giving the power to produce an intended effect ("Written propaganda is less efficacious than the habits and prejudices...of the readers-Aldous Huxley")
adjective:  producing or capable of producing an intended result or having a striking effect ("An efficacious law")

▸ Also see efficaciousness

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Words similar to efficacious:   effective, effectual, efficaciously, efficaciousness, more...

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