Definition of lanthanide in English:

lanthanide

Syllabification: lan·tha·nide
Pronunciation: /ˈlanTHəˌnīd
 
/

noun

Chemistry
  • Any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table. See also rare earth.
    More example sentences
    • The lanthanides make up the elements between barium and hafnium in Row 6 of the periodic table.
    • Elements in this group are also known as the lanthanides after the first element in that group, lanthanum.
    • Other particles containing yttria and some lanthanides are phosphors that be processed to form light-emitting devices.

Origin

1920s: from lanthanum + -ide.

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