ter·​bi·​um | \ ˈtər-bē-əm How to pronounce terbium (audio) \

Definition of terbium

: a metallic element of the rare-earth group with atomic number 65 that occurs naturally only in combination and that is used especially in alloys for electronic equipment and as a green phosphor (see phosphor sense 2) in electronic displays — see Chemical Elements Table

Examples of terbium in a Sentence

Recent Examples on the Web NdFeB magnets containing the heavy rare earth dysprosium and sometimes terbium are particularly useful, because the presence of heavy rare earths improves the magnet’s ability to withstand high temperatures. Mary Hui, Quartz, 14 May 2021 Adding a heavy rare earth like dysprosium and sometimes terbium makes the magnet more temperature stable, and suitable for use in offshore wind turbines where maintenance costs are high. Mary Hui, Quartz, 23 Apr. 2021 During the last 34 million years, the fossils slowly absorbed yttrium, europium, terbium, and dysprosium from the fluid trapped in the mud. Jennifer Frazer, Scientific American, 21 Sep. 2020 Greenland has some of the biggest deposits of neodymium, dysprosium, terbium, praseodymium, and uranium. David Clark Scott, The Christian Science Monitor, 22 Aug. 2019 Neodymium, for example, is used to make magnets found in smartphone speakers and haptic feedback devices, while terbium is used to make solid state hard drives. Klint Finley, WIRED, 17 June 2019 Yet the mine's role at the center of the U.S.-China faceoff over 17 elements with names such as neodymium, terbium and europium is not without irony. David J. Lynch, Anchorage Daily News, 11 June 2019 Yet the mine’s role at the center of the U.S.-China faceoff over 17 elements with names such as neodymium, terbium and europium is not without irony. David J. Lynch, Washington Post, 10 June 2019 This is good news for large wind turbine manufacturers that rely on magnet generators made from neodymium and dysprosium, among other rare-earth elements like praseodymium (Pr) and terbium (Tb). Jill Kiedaisch, Popular Mechanics, 7 Mar. 2019

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

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First Known Use of terbium

1843, in the meaning defined above

History and Etymology for terbium

New Latin, from Ytterby, Sweden

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The first known use of terbium was in 1843

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terbium metal

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Cite this Entry

“Terbium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/terbium. Accessed 26 Sep. 2021.

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More Definitions for terbium


ter·​bi·​um | \ ˈtər-bē-əm How to pronounce terbium (audio) \

Medical Definition of terbium

: a usually trivalent metallic element of the rare-earth group symbol Tb — see Chemical Elements Table

More from Merriam-Webster on terbium

Britannica.com: Encyclopedia article about terbium


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