Definition of “plutonium” - English Dictionary

british dictionary

(Definition of “plutonium” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“plutonium” in American English

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plutoniumnoun [ U ]

us /pluˈtoʊ·ni·əm/

a metal that is used esp. as a fuel in the production of nuclear power, and in nuclear weapons

(Definition of “plutonium” from the Cambridge Academic Content Dictionary © Cambridge University Press)