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Calcium-oxide definition

A white, caustic, lumpy powder, CaO, used as a refractory, as a flux, in glassmaking, in waste treatment, in insecticides, as an industrial alkali, and in manufacturing steel, paper, and building materials.
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A white, soft, caustic solid, CaO, prepared by heating calcium carbonate; lime: used in making mortar and plaster, in ceramics, etc.
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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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(inorganic chemistry) A white powderous substance, CaO, commonly known as lime or quicklime; normally made by heating calcium carbonate.
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Calcium-oxide Sentence Examples

  • The resulting white product is termed calcium oxide lime, burnt lime, quicklime, cob lime, or caustic lime.

  • It was also necessary to give the fine charcoal a thin coating of calcium oxide by soaking it in lime-water, for the temperature was so high that unless it was thus protected it was gradually converted into graphite, losing its insulating power and diffusing the current through the lining and walls of the furnace.

  • Only so much lime is used that an acid manganite is formed corresponding to one molecule of calcium oxide to two of manganous oxide.

  • On cooling this calcium oxide will take up water to form calcium hydroxide.

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