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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) plutonium: American Heritage Dictionary of the English Language [home, info] plutonium: Collins English Dictionary [home, info] plutonium: Vocabulary.com [home, info] plutonium: Macmillan Dictionary [home, info] plutonium: Merriam-Webster's Online Dictionary, 11th Edition [home, info] Plutonium, plutonium: Wordnik [home, info] plutonium: Cambridge Advanced Learner's Dictionary [home, info] Plutonium: Wiktionary [home, info] plutonium: Compact Oxford English Dictionary [home, info] plutonium: Webster's New World College Dictionary, 4th Ed. [home, info] plutonium: The Wordsmyth English Dictionary-Thesaurus [home, info] plutonium: Infoplease Dictionary [home, info] plutonium: Dictionary.com [home, info] plutonium: Online Etymology Dictionary [home, info] plutonium: UltraLingua English Dictionary [home, info] plutonium: Cambridge Dictionary of American English [home, info] Plutonium (Pu), Plutonium (cave), Plutonium (disambiguation), Plutonium: Wikipedia, the Free Encyclopedia [home, info] plutonium: Rhymezone [home, info] plutonium: Hutchinson's Dictionary of Difficult Words [home, info] Plutonium: Encarta® Online Encyclopedia, North American Edition [home, info] plutonium: Free Dictionary [home, info] plutonium: Hutchinson Dictionaries [home, info] plutonium: Mnemonic Dictionary [home, info] plutonium: WordNet 1.7 Vocabulary Helper [home, info] plutonium: LookWAYup Translating Dictionary/Thesaurus [home, info] plutonium: Dictionary/thesaurus [home, info] plutonium: Wikimedia Commons US English Pronunciations [home, info] Art (1 matching dictionary) plutonium: An Etymological Dictionary of Classical Mythology [home, info] Business (1 matching dictionary) Plutonium (Pu): Energy Dictionary [home, info] Computing (1 matching dictionary) Plutonium (Pu), plutonium: Encyclopedia [home, info] Medicine (3 matching dictionaries) Plutonium: Medical Dictionary [home, info] plutonium: online medical dictionary [home, info] Plutonium (Pu), plutonium: Medical dictionary [home, info] Science (3 matching dictionaries) Plutonium: Extragalactic Astronomy [home, info] Plutonium (Pu): NRC Glossary of Nuclear Terms -- [home, info] Plutonium, plutonium: WebElements Periodic Table of the Elements [home, info] Slang (1 matching dictionary) Plutonium: Urban Dictionary [home, info] Tech (3 matching dictionaries) plutonium: NATURAL RESOURCES DEFENSE COUNCIL [home, info] Plutonium: Explosives [home, info] 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