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| di·dym·i·um [ dī dímmee əm ] |
noun |
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| Definition: |
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metal mixture used to color glass: a mixture of metallic elements from the rare-earth, or lanthanide, series of elements, consisting chiefly of neodymium and praseodymium. Use: production of colored glass, optical filters.
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| [Mid-19th century. < Greek didumos "twin"] |
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