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aluminum oxide a natural or synthetic oxide of aluminum; alumina; corundum.
calcium oxide a soft white caustic powder used in the treatment of waste, as an industrial alkali, and in the manufacture of steel, glass, plaster, and insecticides; lime; quicklime.
ferric oxide a red-brown solid compound in the natural form of iron ore or rust, processed for use as a pigment and in metallurgy, magnetic tapes and polishing compounds.
ferrous oxide a powdery black compound of iron used in making steel, a type of glass, and enamels.
lithium oxide a very alkaline powder used in making glass and ceramics; lithia.
nitrogen oxide any of several compounds containing nitrogen and oxygen.
nitrous oxide a colorless, nonflammable, inorganic gas with a sweet taste and smell, used as an anesthetic; laughing gas.
sulfur oxide any of several oxides of sulfur.
zinc oxide a whitish powder used as a pigment, in the manufacture of rubber articles and plastics, and in pharmaceuticals and cosmetics.