lan·​tha·​nide | \ ˈlan(t)-thə-ˌnīd How to pronounce lanthanide (audio) \
variants: or less commonly lanthanoid \ ˈlan(t)-​thə-​ˌnȯid How to pronounce lanthanoid (audio) \

Definition of lanthanide

: any of the series of elements with increasing atomic numbers that begins with lanthanum or cerium and ends with lutetium — see Periodic Table

Examples of lanthanide in a Sentence

Recent Examples on the Web The first possibility is the evolution of a new OPEC-style organization with the power to control vital resources including silicon, copper, lithium, and lanthanides. Andrew Barron, Smithsonian, "The Countries Poised To Become “Renewable Superpowers”," 20 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lanthanide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of lanthanide

1926, in the meaning defined above

History and Etymology for lanthanide

International Scientific Vocabulary

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Time Traveler for lanthanide

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The first known use of lanthanide was in 1926

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Cite this Entry

“Lanthanide.” Dictionary, Merriam-Webster, Accessed 15 Aug. 2020.

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More Definitions for lanthanide


lan·​tha·​nide | \ ˈlan(t)-thə-ˌnīd How to pronounce lanthanide (audio) \

Medical Definition of lanthanide

: any in a series of elements of increasing atomic numbers beginning with lanthanum (57) or cerium (58) and ending with lutetium (71)

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