ce·​ri·​um | \ ˈsir-ē-əm How to pronounce cerium (audio) \

Definition of cerium

: a metallic chemical element that is the most abundant of the rare-earth group and is a chief component of misch metal — see Chemical Elements Table

Examples of cerium in a Sentence

Recent Examples on the Web Or cerium, which is an important material in catalytic converters. Wired, 14 July 2022 Enriched with antioxidant-rich algae extract, blue-light thwarting cerium and moisture-boosting fermentation factors, Sueprgoop’s daily moisturizer has major muscle as a hydrator. Adam Hurly, Robb Report, 4 Apr. 2022 To combat the baldness-causing condition, scientists coated cerium nanoparticles in a biodegradable polyethylene glycol-lipid compound. Joshua Hawkins, BGR, 28 Dec. 2021 The composition of the deposit, however, is such that more than three-quarters of the rare earth elements are the light rare earths cerium and lanthanum, used in oil refining equipment and catalytic converters in internal combustion engine vehicles. Mary Hui, Quartz, 15 July 2021 The problem is that while demand for praseodymium and neodymium is high there is limited demand for other elements which are mined in conjunction, such as cerium and lanthanum. Tim Treadgold, Forbes, 3 Mar. 2021 Ferrocerium is an alloy made from iron, along with cerium, lanthanum, and several other rare-earth minerals. Tim Macwelch, Outdoor Life, 2 Dec. 2020 Lanthanum and cerium are as abundant as copper and lead, and are used in such pedestrian applications as pool cleaner and cigarette-lighter flints. Washington Post, 31 May 2019 Marine scientists at China’s Guangxi Key Laboratory recently deduced the strength of East Asian winter monsoons over the past 150 years by measuring levels of rare earth elements, such as lanthanum and cerium, in each layer of a Porites coral core. Quanta Magazine, 29 May 2018 See More

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

First Known Use of cerium

1804, in the meaning defined above

History and Etymology for cerium

New Latin, from Ceres, an asteroid

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cerium metal

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Statistics for cerium

Last Updated

19 Jul 2022

Cite this Entry

“Cerium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cerium. Accessed 14 Aug. 2022.

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More Definitions for cerium


ce·​ri·​um | \ ˈsir-ē-əm How to pronounce cerium (audio) \

Medical Definition of cerium

: a malleable ductile metallic element that is the most abundant of the rare-earth group symbol Ce — see Chemical Elements Table

More from Merriam-Webster on cerium

Britannica.com: Encyclopedia article about cerium


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