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A Writer's Dictionary:

thorium Definition


Dictionary Home » Words Starting with T » tholing ... threshold » thorium


thorium
noun
    1. chem.
      (symbol Th, atomic number 90) a silvery-grey radioactive metallic element used in X-ray tubes, photoelectric cells and sunlamps. Its isotope thorium-232 is used as a nuclear fuel in breeder reactors.
Etymology: 19c: named after Thor, the Norse god of thunder.



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