calcium oxide
noun
: 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 Stanford team used its lab furnace to heat a mixture of calcium oxide – derived from commonly available limestone that's used to make cement – with another mineral containing magnesium and silicate ions.
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New Atlas, 2 Mar. 2025
The leftover calcium oxide, which looks like flour, is then doused with water and spread onto large trays, which are carried by robots onto tower-high racks and exposed to open air.
—Brad Plumer, New York Times, 9 Nov. 2023
With further study, the researchers concluded that lime clasts arose because of the use of quicklime (calcium oxide) — the most reactive, and dangerous, dry form of limestone — when mixing the concrete, rather than or in addition to slaked lime.
—Katie Hunt, CNN, 6 Jan. 2023
Its technology uses calcium oxide from limestone, which acts sort of like a sponge to draw carbon dioxide out of the ambient air.
—Justine Calma, The Verge, 6 Feb. 2023
One of the biggest problems in dealing with carbon dioxide emissions is the making of the key component of cement: lime (calcium oxide).
—Lloyd Alter, Treehugger, 24 Jan. 2023
Preheated meal is burned in a combustion chamber immediately above and inside the top of the kiln at 750 to 900 degrees C, converting calcium carbonate to calcium oxide (quicklime) and CO2.
—Mark Fischetti, Scientific American, 13 Jan. 2023
But high amounts of calcium detected on his dagger’s hilt suggest that its artisans used a stronger adhesive instead: lime plaster, composed of sand, water and calcium oxide (lime).
—Marisa Sloan, Discover Magazine, 4 Nov. 2022
Clinker is made when limestone, calcium carbonate, is taken out of the ground and heated to 2700 to 2800 degrees (1480 to 1540 degrees Celsius) to turn it into calcium oxide.
—Seth Borenstein, Anchorage Daily News, 23 June 2022
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New Atlas, 2 Mar. 2025
The leftover calcium oxide, which looks like flour, is then doused with water and spread onto large trays, which are carried by robots onto tower-high racks and exposed to open air.
—Brad Plumer, New York Times, 9 Nov. 2023
With further study, the researchers concluded that lime clasts arose because of the use of quicklime (calcium oxide) — the most reactive, and dangerous, dry form of limestone — when mixing the concrete, rather than or in addition to slaked lime.
—Katie Hunt, CNN, 6 Jan. 2023
Its technology uses calcium oxide from limestone, which acts sort of like a sponge to draw carbon dioxide out of the ambient air.
—Justine Calma, The Verge, 6 Feb. 2023
One of the biggest problems in dealing with carbon dioxide emissions is the making of the key component of cement: lime (calcium oxide).
—Lloyd Alter, Treehugger, 24 Jan. 2023
Preheated meal is burned in a combustion chamber immediately above and inside the top of the kiln at 750 to 900 degrees C, converting calcium carbonate to calcium oxide (quicklime) and CO2.
—Mark Fischetti, Scientific American, 13 Jan. 2023
But high amounts of calcium detected on his dagger’s hilt suggest that its artisans used a stronger adhesive instead: lime plaster, composed of sand, water and calcium oxide (lime).
—Marisa Sloan, Discover Magazine, 4 Nov. 2022
Clinker is made when limestone, calcium carbonate, is taken out of the ground and heated to 2700 to 2800 degrees (1480 to 1540 degrees Celsius) to turn it into calcium oxide.
—Seth Borenstein, Anchorage Daily News, 23 June 2022
Cite this Entry
“Calcium oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/calcium%20oxide. Accessed 10 Jul. 2025.
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