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uranium
noun , chem (symbol U, atomic number 92) a dense silvery-white radioactive metallic element, originally discovered in pitchblende in 1789, but now mainly obtained from the ore uraninite. It is chiefly used to produce nuclear energy, as a fuel for nuclear reactors and nuclear weapons, by fission of the isotope uranium-235.
[18c: named after the planet Uranus, discovered shortly before the metal; see Uranian]
uranic adjective .
noun , chem (symbol U, atomic number 92) a dense silvery-white radioactive metallic element, originally discovered in pitchblende in 1789, but now mainly obtained from the ore uraninite. It is chiefly used to produce nuclear energy, as a fuel for nuclear reactors and nuclear weapons, by fission of the isotope uranium-235.
[18c: named after the planet Uranus, discovered shortly before the metal; see Uranian]
uranic adjective .
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