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We found 53 dictionaries with English definitions that include the word radon:
Click on the first link on a line below to go directly to a page where "radon" is defined.

General (27 matching dictionaries)

1. radon: Merriam-Webster.com [home, info]
2. radon: Oxford Learner's Dictionaries [home, info]
3. radon: American Heritage Dictionary of the English Language [home, info]
4. radon: Collins English Dictionary [home, info]
5. radon: Vocabulary.com [home, info]
6. radon: Macmillan Dictionary [home, info]
7. Radon, radon: Wordnik [home, info]
8. radon: Cambridge Advanced Learner's Dictionary [home, info]
9. radon: Wiktionary [home, info]
10. radon: Webster's New World College Dictionary, 4th Ed. [home, info]
11. radon: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. radon: Infoplease Dictionary [home, info]
13. radon: Dictionary.com [home, info]
14. radon: Online Etymology Dictionary [home, info]
15. radon: UltraLingua English Dictionary [home, info]
16. Radon (disambiguation), Radon: Wikipedia, the Free Encyclopedia [home, info]
17. radon: Rhymezone [home, info]
18. radon: Hutchinson's Dictionary of Difficult Words [home, info]
19. Radon: Encarta® Online Encyclopedia, North American Edition [home, info]
20. radon: Free Dictionary [home, info]
21. radon: Hutchinson Dictionaries [home, info]
22. radon: Mnemonic Dictionary [home, info]
23. radon: WordNet 1.7 Vocabulary Helper [home, info]
24. radon: LookWAYup Translating Dictionary/Thesaurus [home, info]
25. radon: Dictionary/thesaurus [home, info]

Business (4 matching dictionaries)

26. Radon: Energy Dictionary [home, info]
27. radon: Legal dictionary [home, info]
28. Radon (Rn), Radon (element), radon: Financial dictionary [home, info]
29. radon: BusinessDictionary.com [home, info]

Computing (1 matching dictionary)

30. Radon (Rn), Radon (element), radon: Encyclopedia [home, info]

Medicine (8 matching dictionaries)

31. Radon: MedTerms.com Medical Dictionary [home, info]
32. Radon: Medical Dictionary [home, info]
33. Radon: Merck Manuals [home, info]
34. radon: online medical dictionary [home, info]
35. radon: Dictionary of Cancer Terms [home, info]
36. Radon (Rn), Radon (element), radon: Medical dictionary [home, info]
37. Radon: Drug Medical Dictionary [home, info]
38. radon: Hyperdictionary [home, info]

Miscellaneous (1 matching dictionary)

39. RADON: Acronym Finder [home, info]

Science (2 matching dictionaries)

40. Radon (Rn): NRC Glossary of Nuclear Terms -- [home, info]
41. Radon, radon, radon (emanio): WebElements Periodic Table of the Elements [home, info]

Slang (1 matching dictionary)

42. radon: Urban Dictionary [home, info]

Tech (9 matching dictionaries)

43. radon: NATURAL RESOURCES DEFENSE COUNCIL [home, info]
44. Radon: Glossary of Air Pollution Terms [home, info]
45. Radon: AUTOMOTIVE TERMS [home, info]
46. radon: Glossary of Meteorology [home, info]
47. Radon: Explosives [home, info]
48. RADON: Lake and Water Word Glossary [home, info]
49. Radon: Construction Glossary [home, info]
50. Radon: Glossary of Energy Terms [home, info]
51. Radon: Nuclear Terms [home, info]

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (radon) ▸ noun:  a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health ▸ name:  A surname (very rare: popularity rank in the U.S.: #79428) ▸ Word origin ▸ Words similar to radon ▸ Usage examples for radon ▸ Idioms related to radon (New!) ▸ Popular adjectives describing radon ▸ Words that often appear near radon ▸ Rhymes of radon ▸ Invented words related to radon