cal·ci·um (k l s - m)n. Symbol Ca A silvery, moderately hard metallic element that constitutes approximately 3 percent of the earth's crust and is a basic component of most animals and plants. It occurs naturally in limestone, gypsum, and fluorite, and its compounds are used to make plaster, quicklime, Portland cement, and metallurgic and electronic materials. 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 Table at element. [Latin calx, calc-, lime; see calx + -ium.] |
calcium [ˈkælsɪəm]
n
(Chemistry / Elements & Compounds) 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
[from New Latin, from Latin calx lime]
cal•ci•um (ˈkæl si əm)
n.
a silver-white divalent metal, combined in limestone, chalk, etc., occurring also in animals in bone, shell, etc. Symbol: Ca; at. wt.: 40.08; at. no.: 20; sp. gr.: 1.55 at 20°C.
[1808; < Latin calc-, s. of calx lime, limestone + New Latin -ium -ium2]
| calcium (kls-m) Symbol Ca 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. |
Thesaurus Legend: Synonyms Related Words Antonyms
| Noun | 1. |  calcium - a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animalsmetal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. fluor, fluorite, fluorspar - a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine gypsum - a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris) burnt lime, calcined lime, calcium oxide, calx, fluxing lime, quicklime, unslaked lime, lime - a white crystalline oxide used in the production of calcium hydroxide limestone - a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals calcium ion, factor IV - ion of calcium; a factor in the clotting of blood |
Translations
an element of which one compound (calcium carbonate) forms limestone, chalk etc.
calcium → كالسيوم vápník calcium Kalzium ασβέστιο calcio kalsium calcium kalcij calcio カルシウム 칼슘 calcium kalsium wapń cálcio кальций kalcium แคลเซี่ยม kalsiyum canxi 钙
cal·ci·um
n. calcio, sustancia mineral necesaria en el desarrollo de los huesos y tejidos; ___ carbonate → carbonato cálcico.
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