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English definition of “plutonium”

plutonium

noun [U]     /pluːˈtəʊ.ni.əm/ US  /-ˈtoʊ-/ (symbol Pu)
a chemical element that is a metal used in the production of nuclear power , and in nuclear weapons Chemical elements
(Definition of plutonium noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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