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A Writer's Dictionary:

thulium Definition


Dictionary Home » Words Starting with T » throw something out ... tick someone off » thulium


thulium
noun
    1. chem.
      (symbol Tm, atomic number 69) a soft silvery-white metallic element that is a member of the lanthanide series and is used as a source of X-rays and gamma rays.
Etymology: 19c: from Latin Thule, a northern region thought to be the most northerly in the world.



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