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calamity an event causing extreme harm, suffering, or destruction; disaster. [2 definitions]
calamondin a small citrus tree that grows in the Philippines. [2 definitions]
calamus a wild iris known as the sweet flag, or its aromatic root. [3 definitions]
calash a carriage with two low wheels, a seat for two people under a top that folds down, and a front seat for a driver. [2 definitions]
calcaneus the large tarsal bone that forms the human heel. [2 definitions]
calcareous of, containing, or resembling calcium carbonate; chalky.
calces a pl. of calx.
calci- calcium.
calciferol a form of vitamin D.
calciferous in chemistry, composed of, containing, or forming calcium, esp. calcium carbonate.
calcify in physiology, to make or become bony or hard by the deposit of calcium salts. [2 definitions]
calcimine a white or light-colored wash containing zinc oxide, used to cover walls and ceilings. [2 definitions]
calcine to heat or become heated so as to oxidize, remove moisture, or reduce to a loose, ashy state, but not so as to melt; reduce to calx.
calcite a common mineral that occurs in chalk, marble, and limestone and is composed of calcium carbonate.
calcium a chemical element of the alkaline-earth group that has twenty protons in each nucleus and occurs widely in nature, but only in compounds such as calcite or limestone. (symbol: Ca) [2 definitions]
calcium carbide a dark gray crystalline compound used as a dehydrating agent and a source of acetylene gas and calcium cyanimide.
calcium carbonate a white crystalline compound found in chalk, limestone, marble, shells, and plant ash that is used in the manufacture of cement, paints, plastics, and polishing agents such as toothpaste.
calcium chloride a white crystalline compound, derived from calcium carbonate, that is used as a dehydrating agent, de-icer, and dust suppressant.
calcium cyanamide a white powder used mainly as a fertilizer or weed killer; cyanamide.
calcium fluoride a white powder used in cements and other industrial products and as a tooth decay preventive.
calcium hydroxide a soft white crystalline compound made by the action of water on calcium oxide and used in the manufacture of cement, plaster, hard rubber products, and bleaching powder; slaked lime.