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    thulium

    thulium - 365bet中国官方网站 definition and meaning for word thulium

    Definition
    (noun) a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime
    Synonyms : atomic number 69 , tm
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