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or U 238


uranium 238

noun, Chemistry.
the radioactive uranium isotope having a mass number 238, comprising 99.28 percent of natural uranium: used chiefly in nuclear reactors as a source of the fissionable isotope plutonium 239.
Also called U-238, U 238.
Origin of uranium 238
First recorded in 1940-45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for U-238
Historical Examples
  • I could use it for separating U-235 from U-238 just as easily.

    A Feast of Demons William Morrison
  • If you can use your demons to separate U-235 from U-238, you can use them for separating gold from sea water.

    A Feast of Demons William Morrison

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