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didymium

Syllabification: (di·dym·i·um)
Pronunciation: /dīˈdimēəm/

Definition of didymium

noun

Chemistry
  • a mixture containing the rare earth elements praseodymium and neodymium, used to color glass for optical filters. It was originally regarded as a single element.

Origin:

mid 19th century: from Greek didumos 'twin' (because it was closely associated with lanthanum) + -ium (used as a suffix for new metals)

didymium in other Oxford dictionaries

Definition of didymium in the British & World English dictionary

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