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We found 42 dictionaries with English definitions that include the word pernicious:
Click on the first link on a line below to go directly to a page where "pernicious" is defined.

General dictionaries General (34 matching dictionaries)
  1. pernicious: Merriam-Webster.com [home, info]
  2. pernicious: Oxford Learner's Dictionaries [home, info]
  3. pernicious: American Heritage Dictionary of the English Language [home, info]
  4. pernicious: Collins English Dictionary [home, info]
  5. pernicious: Vocabulary.com [home, info]
  6. pernicious: Macmillan Dictionary [home, info]
  7. Pernicious, pernicious: Wordnik [home, info]
  8. pernicious: Cambridge Advanced Learner's Dictionary [home, info]
  9. pernicious: Wiktionary [home, info]
  10. pernicious: Webster's New World College Dictionary, 4th Ed. [home, info]
  11. pernicious: V2 Vocabulary Building Dictionary [home, info]
  12. pernicious: The Wordsmyth English Dictionary-Thesaurus [home, info]
  13. pernicious: Infoplease Dictionary [home, info]
  14. pernicious: Dictionary.com [home, info]
  15. pernicious: Online Etymology Dictionary [home, info]
  16. pernicious: UltraLingua English Dictionary [home, info]
  17. pernicious: Cambridge Dictionary of American English [home, info]
  18. Pernicious: Wikipedia, the Free Encyclopedia [home, info]
  19. Pernicious: Online Plain Text English Dictionary [home, info]
  20. pernicious: Webster's Revised Unabridged, 1913 Edition [home, info]
  21. pernicious: Rhymezone [home, info]
  22. Pernicious: AllWords.com Multi-Lingual Dictionary [home, info]
  23. pernicious: Webster's 1828 Dictionary [home, info]
  24. pernicious: Stammtisch Beau Fleuve Acronyms [home, info]
  25. pernicious: Hutchinson's Dictionary of Difficult Words [home, info]
  26. pernicious: Free Dictionary [home, info]
  27. pernicious: Hutchinson Dictionaries [home, info]
  28. pernicious: The Phrontistery - A Dictionary of Obscure Words [home, info]
  29. pernicious: Mnemonic Dictionary [home, info]
  30. pernicious: WordNet 1.7 Vocabulary Helper [home, info]
  31. pernicious: LookWAYup Translating Dictionary/Thesaurus [home, info]
  32. pernicious: Dictionary/thesaurus [home, info]

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

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

Medicine dictionaries Medicine (4 matching dictionaries)
  1. pernicious: online medical dictionary [home, info]
  2. Pernicious: Hepatitis C Information Central [home, info]
  3. pernicious: Medical dictionary [home, info]
  4. pernicious: Hyperdictionary [home, info]

Miscellaneous dictionaries Miscellaneous (1 matching dictionary)
  1. pernicious: A Word A Day [home, info]

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

(Note: See perniciousness for more definitions.)

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (pernicious)

adjective:  working or spreading in a hidden and usually injurious way
adjective:  exceedingly harmful

▸ Also see perniciousness
Word origin

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Phrases that include pernicious:   pernicious anaemia, anemia pernicious, pernicious malaria, congenital pernicious anemia, vomiting of pregnancy pernicious, more...

Words similar to pernicious:   baneful, deadly, insidious, perniciously, perniciousness, pestilent, subtle, evil, more...

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