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We found 30 dictionaries with English definitions that include the word actinium:
Click on the first link on a line below to go directly to a page where "actinium" is defined.

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

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

Medicine dictionaries Medicine (3 matching dictionaries)
  1. Actinium: Medical Dictionary [home, info]
  2. actinium: online medical dictionary [home, info]
  3. actinium: Medical dictionary [home, info]

Science dictionaries Science (2 matching dictionaries)
  1. Actinium: Extragalactic Astronomy [home, info]
  2. Actinium, actinium: WebElements Periodic Table of the Elements [home, info]

Quick definitions from WordNet (actinium)

noun:  a radioactive element of the actinide series; found in uranium ores

Words similar to actinium

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Phrases that include actinium:   actinium emanation, cerithidium actinium more...

Words similar to actinium:   ac, atomic number 89, more...

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