lutetium

noun

lu·​te·​tium lü-ˈtē-sh(ē-)əm How to pronounce lutetium (audio)
: a metallic chemical element of the rare-earth group that has few practical applications but is sometimes used as a catalyst in cracking and as a radiation source for treatment of certain cancers see Chemical Elements Table

Example Sentences

Recent Examples on the Web The least abundant of these, thulium (Tm) and lutetium (Lu) are 200 times more abundant than gold. Willy Shih, Forbes, 24 Feb. 2021

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

Word History

Etymology

New Latin, from Latin Lutetia, ancient name of Paris

First Known Use

1907, in the meaning defined above

Time Traveler
The first known use of lutetium was in 1907

Dictionary Entries Near lutetium

Cite this Entry

“Lutetium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lutetium. Accessed 9 Dec. 2022.

Kids Definition

lutetium

noun
lu·​te·​tium lü-ˈtē-sh(ē-)əm How to pronounce lutetium (audio)
: a soft metallic chemical element see element

Medical Definition

lutetium

noun
lu·​te·​tium
variants also lutecium
: a metallic element of the rare-earth group
symbol Lu
see Chemical Elements Table

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