thulium

noun

thu·​li·​um ˈthü-lē-əm How to pronounce thulium (audio)
ˈthyü-
: a soft silvery metallic element of the rare-earth group see Chemical Elements Table

Examples of thulium in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The extra proton changes the erbium atom to thulium and releases energy. — Bayarbadrakh Baramsai, IEEE Spectrum, 27 Feb. 2022 The extra proton changes the erbium atom to thulium and release energy. — Bayarbadrakh Baramsai, IEEE Spectrum, 27 Feb. 2022

Word History

Etymology

New Latin, from Latin Thule

First Known Use

1879, in the meaning defined above

Time Traveler
The first known use of thulium was in 1879

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thulium
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Cite this Entry

“Thulium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thulium. Accessed 20 Mar. 2025.

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Kids Definition

thulium

noun
thu·​li·​um ˈth(y)ü-lē-əm How to pronounce thulium (audio)
: a soft rare metallic element see element

Medical Definition

thulium

noun
thu·​li·​um ˈth(y)ü-lē-əm How to pronounce thulium (audio)
: a trivalent metallic element of the rare-earth group
—symbol Tm see Chemical Elements Table

More from Merriam-Webster on thulium

Britannica.com: Encyclopedia article about thulium

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