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

General (29 matching dictionaries)

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

Art (1 matching dictionary)

28. plutonium: An Etymological Dictionary of Classical Mythology [home, info]

Business (1 matching dictionary)

29. Plutonium (Pu): Energy Dictionary [home, info]

Computing (1 matching dictionary)

30. Plutonium (Pu), plutonium: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

31. Plutonium: Medical Dictionary [home, info]
32. plutonium: online medical dictionary [home, info]
33. Plutonium (Pu), plutonium: Medical dictionary [home, info]

Science (3 matching dictionaries)

34. Plutonium: Extragalactic Astronomy [home, info]
35. Plutonium (Pu): NRC Glossary of Nuclear Terms -- [home, info]
36. Plutonium, plutonium: WebElements Periodic Table of the Elements [home, info]

Slang (1 matching dictionary)

37. Plutonium: Urban Dictionary [home, info]

Tech (3 matching dictionaries)

38. plutonium: NATURAL RESOURCES DEFENSE COUNCIL [home, info]
39. Plutonium: Explosives [home, info]
40. Plutonium: Nuclear Terms [home, info]

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (plutonium) ▸ noun:  a solid silvery gray radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239 ▸ Word origin ▸ Words similar to plutonium ▸ Usage examples for plutonium ▸ Popular adjectives describing plutonium ▸ Words that often appear near plutonium ▸ Rhymes of plutonium ▸ Invented words related to plutonium