Definition of uranium noun from the Oxford Advanced Learner's Dictionary



BrE BrE//juˈreɪniəm//
; NAmE NAmE//juˈreɪniəm//
[uncountable] (symbol U)
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a chemical element. Uranium is a heavy, silver-white, radioactive metal, used mainly in producing nuclear energy. a tonne of highly enriched uranium Word Originlate 18th cent.: modern Latin, from Uranus: compare with tellurium.
See the Oxford Advanced American Dictionary entry: uranium