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We found 44 dictionaries with English definitions that include the word radioactive:
Click on the first link on a line below to go directly to a page where "radioactive" is defined.

General dictionaries General (27 matching dictionaries)
  1. radioactive: Merriam-Webster.com [home, info]
  2. radioactive: Oxford Dictionaries [home, info]
  3. radioactive: American Heritage Dictionary of the English Language [home, info]
  4. radioactive: Collins English Dictionary [home, info]
  5. radioactive: Vocabulary.com [home, info]
  6. radioactive: Macmillan Dictionary [home, info]
  7. Radioactive, radioactive: Wordnik [home, info]
  8. radioactive: Cambridge Advanced Learner's Dictionary [home, info]
  9. radioactive: Wiktionary [home, info]
  10. radioactive: Webster's New World College Dictionary, 4th Ed. [home, info]
  11. radioactive: The Wordsmyth English Dictionary-Thesaurus [home, info]
  12. radioactive: Infoplease Dictionary [home, info]
  13. radioactive: Dictionary.com [home, info]
  14. radioactive: Online Etymology Dictionary [home, info]
  15. radioactive: UltraLingua English Dictionary [home, info]
  16. radioactive: Cambridge Dictionary of American English [home, info]
  17. Radioactive (Gene Simmons song), Radioactive (Imagine Dragons song), Radioactive (Kings of Leon song), Radioactive (Radioactive), Radioactive (Rita Ora song), Radioactive (The Firm song), Radioactive (Yelawolf album), Radioactive (disambiguation), Radioactive (song), Radioactive: Wikipedia, the Free Encyclopedia [home, info]
  18. radioactive: Rhymezone [home, info]
  19. radioactive: AllWords.com Multi-Lingual Dictionary [home, info]
  20. radioactive: Free Dictionary [home, info]
  21. radioactive: The Phrontistery - A Dictionary of Obscure Words [home, info]
  22. radioactive: Mnemonic Dictionary [home, info]
  23. radioactive: WordNet 1.7 Vocabulary Helper [home, info]
  24. radioactive: LookWAYup Translating Dictionary/Thesaurus [home, info]
  25. radioactive: Dictionary/thesaurus [home, info]

Business dictionaries Business (1 matching dictionary)
  1. radioactive: BusinessDictionary.com [home, info]

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

Medicine dictionaries Medicine (8 matching dictionaries)
  1. radioactive: Breast Cancer Talking Dictionary [home, info]
  2. Radioactive: MedTerms.com Medical Dictionary [home, info]
  3. radioactive: online medical dictionary [home, info]
  4. radioactive: Prostate Cancer Interactive Glossary [home, info]
  5. radioactive: Dictionary of Cancer Terms [home, info]
  6. radioactive: Medical dictionary [home, info]
  7. Radioactive: Drug Medical Dictionary [home, info]
  8. radioactive: Hyperdictionary [home, info]

Science dictionaries Science (4 matching dictionaries)
  1. Radioactive: Misunderstood Physics Terms [home, info]
  2. Radioactive: Eric Weisstein's World of Physics [home, info]
  3. Radioactive: Physic and Astronomy Glossary [home, info]
  4. radioactive: UNCChem Glossary [home, info]

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

Tech dictionaries Tech (2 matching dictionaries)
  1. radioactive: NATURAL RESOURCES DEFENSE COUNCIL [home, info]
  2. Radioactive: Gems and Precious Stones [home, info]

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (radioactive)

adjective:  exhibiting or caused by radioactivity ("Radioactive isotope")

Word origin

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Popular nouns described by radioactive

Words that often appear near radioactive

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Invented words related to radioactive

Phrases that include radioactive:   radioactive iodine, radioactive fallout, high level radioactive waste, low level radioactive waste, radioactive iodine uptake test, more...

Words similar to radioactive:   radioactively, more...

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