lanthanide

Pronunciation

• enPR: lăn'thənīd, IPA ^(key): /ˈlænθənaɪd/

• Audio (UK)

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Noun

Singular lanthanide

Plural lanthanides

1. (chemistry) A lanthanide is an element that had the atomic number between 57 and 71 in the periodic table. These elements are also called rare earth elements.
   • Synonym: lanthanoid