the process of body tissues hardening due to the deposition of calcium salts, occurring naturally in bones and teeth or pathologically in other tissues

calcium carbonate; a white solid substance insoluble in water that is used to manufacture cement, ceramics, lime, and medicinal products

calcium tablet; a medicinal tablet rich in calcium

calcium oxide; a chemical compound also known as quicklime or [[生石灰|生石灰|sheng1 shi2 hui1]]

calcium phosphate; a white powder that is the main component of apatite, often used in fertilizers and medicines

calcium hydroxide Ca(OH)2; slaked lime

calcium carbide CaC2

black earth; fertile dark soil rich in organic matter and lime

white crystalline compound used as a drying agent, refrigerant, or food preservative

a chemical compound used as a fertilizer and in industrial processes

calcium sulfate; a white chemical compound that occurs naturally as gypsum or anhydrite and is used in the manufacture of cement, ceramics, and fertilizer

an inorganic chemical compound (Ca3P2) used in rodenticides and marine flares

calcium bicarbonate Ca(HCO3)2

(geology) a form of limestone deposited by mineral springs, such as tufa or adarce

calcium; the nutrient or substance containing [[钙|鈣|gai4]] which is the main component of bones and teeth

a hormone produced in the thyroid that helps regulate calcium levels in the blood