Definition of calcium oxide
: a caustic solid CaO that is white when pure and that is the chief constituent of lime
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Recent Examples of calcium oxide from the Web
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There the calcium carbonate is heated to 900°C to release pure carbon-dioxide gas ready for capture, and calcium oxide.
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On top of the harling went several coats of limewash, a mixture of water and calcium oxide.
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The concrete is made of quicklime, or calcium oxide, and volcanic ash.
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
Learn More about calcium oxide
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Britannica.com: Encyclopedia article about calcium oxide
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