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neodymium

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˌniːəʊˈdɪmɪəm/US:USA pronunciation: respellingUSA pronunciation: respelling(nē′ō dim′ē əm)


WordReference Random House Unabridged Dictionary of American English © 2026
ne•o•dym•i•um  (nē′ō dim′ē əm),USA pronunciation n. [Chem.]
  1. Chemistrya rare-earth, metallic, trivalent element occurring with cerium and other rare-earth metals, and having rose-colored to violet-colored salts. Symbol: Nd;
    at. wt.: 144.24;
    at. no.: 60;
    sp. gr.: 6.9 at 20°C.
  • Neo-Latin; see neo-, didymium
  • 1880–85

Collins Concise English Dictionary © HarperCollins Publishers::
neodymium /ˌniːəʊˈdɪmɪəm/ n
  1. a toxic silvery-white metallic element of the lanthanide series, occurring principally in monazite: used in colouring glass. Symbol: Nd; atomic no: 60; atomic wt: 144.24; valency: 3; relative density: 6.80 and 7.00 (depending on allotrope); melting pt: 1024°C; boiling pt: 3127°C
Etymology: 19th Century: New Latin; see neo- + didymium
'neodymium' also found in these entries (note: many are not synonyms or translations):
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