Definition of lanthanide in English:

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Pronunciation: /ˈlanTHəˌnīd/


Any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table. See also rare earth.
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.


1920s: from lanthanum + -ide.

For editors and proofreaders

Syllabification: lan·tha·nide

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