ALL meanings of calcium
cal·ci·um
C c - uncountable noun calcium Calcium is a soft white element which is found in bones and teeth, and also in limestone, chalk, and marble. 3
- noun calcium a malleable silvery-white metallic element of the alkaline earth group; the fifth most abundant element in the earth's crust (3.6 per cent), occurring esp as forms of calcium carbonate. It is an essential constituent of bones and teeth and is used as a deoxidizer in steel. Symbol: Ca; atomic no: 20; atomic wt: 40.078; valency: 2; relative density: 1.55; melting pt: 842±2°C; boiling pt: 1494°C 3
- noun calcium a soft, silver-white, metallic chemical element, one of the alkaline-earth metals, found in limestone, marble, chalk, etc., always in combination: it is used as a reducing agent and in fertilizer, and is the essential part of bones, shells, and teeth: symbol, Ca; at. no., 20 3
- noun calcium a silver-white divalent metal, occurring combined in limestone, chalk, gypsum, etc., occurring also in vertebrates and other animals, as a component of bone, skeletal mass, shell, etc., and as a necessary element in nerve conduction, heartbeat, muscle contraction, and many other physiological functions. Symbol: Ca; atomic weight: 40.08; atomic number: 20; specific gravity: 1.55 at 20°C. 1
- noun calcium nutrient found in milk, etc. 1
- noun calcium substance found in chalk, etc. 1
- noun calcium The chemical element of atomic number 20, a soft gray metal. 1
- noun calcium A chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks. 0
- noun calcium (Countable Noun) An atom of this element. 0