calcium oxide

noun

Definition of calcium oxide

: a caustic solid CaO that is white when pure and that is the chief constituent of lime

Examples of calcium oxide in a Sentence

Recent Examples on the Web The residue contained sulfur and mercury, as well as magnesium, nitrates, phosphorus, calcium (possibly derived from calcium oxide, a component of Greek fire), lead, and iron. Jennifer Ouellette, Ars Technica, 3 May 2022 The plants also contain lime — calcium oxide — that made the glass more stable. Carolyn Wilke, Smithsonian Magazine, 24 Nov. 2021 Geochemcial analysis of the soil showed elevated levels of calcium oxide and manganese oxide, chemical signals consistent with those expected to be produced by the purification of a body. Brian Handwerk, Smithsonian Magazine, 5 May 2021 The gates, entrances and grounds of many farms were covered in snowy layers of calcium oxide, a disinfectant. Washington Post, 25 Sep. 2019 The primary ingredient in concrete is calcium oxide, which is taken from limestone (CaCO3)—and that leaves CO2 as a byproduct. Scott K. Johnson, Ars Technica, 17 Sep. 2019 There the calcium carbonate is heated to 900°C to release pure carbon-dioxide gas ready for capture, and calcium oxide. The Economist, 7 June 2018 On top of the harling went several coats of limewash, a mixture of water and calcium oxide. David Kamp, Vanities, 22 Sep. 2017 The concrete is made of quicklime, or calcium oxide, and volcanic ash. Erin Blakemore, Smithsonian, 5 July 2017 See More

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

First Known Use of calcium oxide

1859, in the meaning defined above

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Time Traveler for calcium oxide

Time Traveler

The first known use of calcium oxide was in 1859

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Dictionary Entries Near calcium oxide

calcium oxalate

calcium oxide

calcium phosphate

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Statistics for calcium oxide

Last Updated

18 May 2022

Cite this Entry

“Calcium oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/calcium%20oxide. Accessed 1 Jul. 2022.

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More from Merriam-Webster on calcium oxide

Britannica.com: Encyclopedia article about calcium oxide

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