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calcium
[kal-see-uhm]
noun
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. Ca; 40.08; 20; 1.55 at 20°C.
calcium
/ ˈæɪə /
noun
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
calcium
A silvery-white, moderately hard metallic element of the alkaline-earth group that occurs in limestone and gypsum. It is a basic component of leaves, bones, teeth, and shells, and is essential for the normal growth and development of most animals and plants. Calcium is used to make plaster, cement, and alloys. Atomic number 20; atomic weight 40.08; melting point 842 to 848°C; boiling point 1,487°C; specific gravity 1.55; valence 2.
See Periodic Table
51Թ History and Origins
Origin of calcium1
Example Sentences
Adults are less sensitive to lead, but under much higher concentrations — beyond 40 mcg/dL — the metal, which the body mistakes for calcium, can damage many organs.
The greens are also rich in Vitamin A, Vitamin B, Vitamin B6 and minerals, including magnesium, phosphorus, iron, calcium and potassium.
The Indian Coast Guard said that the ship was carrying 13 containers of hazardous cargo and 12 with calcium carbide - a chemical that reacts with seawater to release a flammable gas.
Some crustaceans, for example, have a hard time developing hard outer shells made of calcium carbonate if the water is too acidic.
Veterinary hospital staff have begun providing Violeta UV light treatments and calcium supplements to help her recover.
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