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U-235

or U 235

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Chemistry.
  1. uranium 235.
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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.
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Origin of uranium 235

First recorded in 1935–40
Also called U-235, U 235, actinouranium.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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

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

    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