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| Matching Terms: | | atomic number 9, atomic number 90, atomic number 91, atomic number 92, atomic number 93, atomic number 95, atomic number 96, atomic number 97, atomic number 98, atomic number 99
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 WordNet Dictionary |
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| | Definition: | | [n] a radioactive transuranic element that is similar to uranium; 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 |
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| | Synonyms: | | plutonium, Pu |
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| | See Also: | | chemical element, element, plutonium 239 |
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