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U-235

or U 235

Chemistry

uranium 235

noun, Chemistry
1.
the radioactive uranium isotope having a mass number of 235, comprising 0.715 percent of natural uranium. When bombarded with neutrons it undergoes fission with the release of energy.
Also called U-235, U 235, actinouranium.
Origin of uranium 235
1935-1940
1935-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for U-235
Historical Examples
  • I could use it for separating U-235 from U-238 just as easily.

    A Feast of Demons William Morrison
  • It was filled with neat rows of U-235 pellets, hardly an inch in diameter.

    Monsoons of Death Gerald Vance
  • 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
  • With a grim exultation pounding in his temples, Ward hurled a pellet of U-235 directly into their midst.

    Monsoons of Death Gerald Vance

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