uranium 238 1
noundomain: substance
Princeton WordNet [ver.3.1]
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EnglishDefinition
the commonest isotope of uranium; it is not fissionable but when irradiated with neutrons it produces fissionable plutonium 239
Hypernym
uranium 1
noun
a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
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