neodymium

From neo- +‎ (di)dymium.

• (UK) IPA^(key): /nɪə(ʊ)ˈdɪmɪəm/
• (US) enPR: nēōdĭm'ēəm, IPA^(key): /ˌniː.oʊˈdɪmiəm/

• Audio (US):

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• Audio (General American):

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neodymium (countable and uncountable, plural neodymiums)

1. A chemical element (symbol Nd) with an atomic number of 60: a hard, slightly malleable silvery metal that quickly tarnishes in air and moisture.
   • 2004, Richard Fortey, The Earth, Folio Society, published 2011, page 63:

     Other rare elements, like neodymium, exist in more than one isotopic form, the ratios of which can provide a measure of the depth from which the flow material may ultimately have been derived.

   • 2025 July 18, Timothy McLaughlin, “A Rebel Army Is Building a Rare-Earth Empire on China's Border. The Kachin Independence Organization fought for decades in obscurity. Now it's supplying essential minerals to manufacturers around the world”, in Bloomberg Businessweek‎^[1], archived from the original on 18 July 2025:

     The most important application of dysprosium and terbium, which belong to a subgroup known as the heavy rare earths, is in devices called neodymium boron magnets, or neo magnets for short.

2. (countable) A single atom of this element.

• neodymian
• neodymium magnet
• neodymium trichloride

• didymium
• praseodymium

• bastnasite
• monazite

neodymium

1. alternative form of neodym
   • 2016, Rune Stefansson, Den sidste olie, Lindhardt og Ringhof, →ISBN:

     De sjældne jordarter, der findes i Kvanefjeld, neodymium og ...

     (please add an English translation of this quotation)

   • 1986, Københavns universitet, Årbog:

     Bly- og neodymium-isotopsystemerne har vist sig at give meget vigtige petrogenetiske data, ...

     (please add an English translation of this quotation)

   • 2016, Rune Stefansson, Den sidste olie, Lindhardt og Ringhof, →ISBN:

     Kineserne skulle bruge neodymium og dysprosium i elektronik, ...

     (please add an English translation of this quotation)

   • 2012, Hans P. Steenfos, Jørgen Taagholt, Grønlands teknologihistorie, Gyldendal A/S, →ISBN:

     Som eksempler kan nævnes lanthan, erbium, dysprosium, lutetium og neodymium.

     (please add an English translation of this quotation)

   • 2013, Mattias Tesfaye, Kloge hænder, Gyldendal A/S, →ISBN:

     Tag for eksempel den sjældne jordart neodymium, ...

     (please add an English translation of this quotation)

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neodymium n (uncountable)

1. neodymium

• (Classical Latin) IPA^(key): [ne.ɔˈdy.mi.ũː]
• (modern Italianate Ecclesiastical) IPA^(key): [ne.oˈd̪iː.mi.um]

neodymium n (genitive neodymiī); second declension

1. neodymium

Second-declension noun (neuter).