calcium oxide

British  

noun

1. Also called: lime.   quicklime.   calx.   burnt lime.   calcined lime.   fluxing lime.  a white crystalline base used in the production of calcium hydroxide and bleaching powder and in the manufacture of glass, paper, and steel. Formula: CaO

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calcium oxide Scientific  

1. A white solid compound that has a very high melting point and reacts with water to form calcium hydroxide. It is often prepared commercially by heating limestone. Calcium oxide is used as an alkali for treating acidic soils and in manufacturing steel, paper, and glass, and it is the main component of lime. Chemical formula: CaO.

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Example Sentences

The path is a relic of an earlier era, when a railroad cut through the area and a brick furnace raged along the Stillaguamish River, converting limestone into calcium oxide.

From Seattle Times

Lime is a white caustic powdery substance comprised of calcium oxide, made by heating limestone.

From Reuters

Lime clasts have long been observed in the quicklime, or calcium oxide, that was a mainstay of the Roman empire’s concrete mixtures.

From Washington Times

Once you grind calcium oxide into powder and add water, you re-create limestone.

From Seattle Times

When these are treated at temperature of about 900C, the pellets decompose into a CO2 stream and calcium oxide.

From BBC