uranium
English Thesaurus
1. a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons (noun.substance)
| hypernym | : | metal, metallic element, |
| definition | : | any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. (noun.substance) |
| hyponym | : | uranium 235, |
| definition | : | a uranium isotope with mass number 235; capable of sustaining chain reactions (noun.substance) |
| hyponym | : | uranium 238, |
| definition | : | the commonest isotope of uranium; it is not fissionable but when irradiated with neutrons it produces fissionable plutonium 239 (noun.substance) |
| substance meronym | : | pitchblende, uraninite, |
| definition | : | a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore (noun.substance) |
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