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didymium

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noun di·dym·i·um \dī-ˈdi-mē-əm\

Definition of didymium

  1. :  a mixture of rare-earth elements made up chiefly of neodymium and praseodymium and used especially for coloring glass for optical filters



Origin of didymium

New Latin, from Greek didymos twin, from dyo two — more at two


First Known Use: 1842


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