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

There the calcium carbonate is heated to 900°C to release pure carbon-dioxide gas ready for capture, and calcium oxide. — The Economist, "Extracting carbon dioxide from the air is possible. But at what cost?," 7 June 2018 On top of the harling went several coats of limewash, a mixture of water and calcium oxide. — David Kamp, Vanities, "How Jeremy Irons Rescued and Restored a 15th-Century Irish Castle," 22 Sep. 2017 The concrete is made of quicklime, or calcium oxide, and volcanic ash. — Erin Blakemore, Smithsonian, "Why Ancient Roman Concrete Is So Strong," 5 July 2017

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.