calciumn.

Brit.

/ˈkalsɪəm/, U.S.

/ˈkælsiəm/

Etymology: < (by Sir H. Davy) Latin calx, calc(i)- lime, on the type of other names of metals in -ium suffix.

Chemistry.

A chemical element, one of the ‘metals of the alkaline earths’, being the basis of lime; though one of the most widely diffused of elements, it is found in nature only in composition, and was first separated by Davy in 1808, as a light yellow metal, ductile and malleable, about as hard as gold, which rapidly oxidizes in air containing moisture, and forms ‘quick-lime’. Symbol Ca.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > calcium > [noun]

calcium1808

Ca1830

1808 H. Davy in Philos. Trans. (Royal Soc.) 98 346 I shall venture to denominate the metals from the alkaline earths barium, strontium, calcium, and magnium.

1815 W. Phillips Outl. Mineral. & Geol. (ed. 3) 25 Lime has been proved by Sir H. Davy..to be a metallic oxide, consisting of 28 per cent. of oxygen and 72 of calcium.

1878 T. H. Huxley Physiography (ed. 2) 81 A solid carbonate of calcium..more commonly termed carbonate of lime.

1881 Lockyer in Nature No. 614. 321/2 Those short common lines of calcium which for years past we had watched coming out of the salts of calcium when decomposition was taking place.

Compounds

General attributive = calcic adj.; as in calcium compounds, calcium salts, etc.; esp.

calcium carbonate n. CaCO₃, carbonate of lime, or limestone, and arragonite.

ΚΠ

1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 370 Calcium carbonate is always precipitated.

Categories »

calcium chloride n. CaCl₂, chloride of lime, bleaching powder.

Categories »

calcium fluoride n. CaFl₂, fluor spar.

calcium light n. the lime-light.

ΘΚΠ

the world > matter > light > firework > [noun] > limelight

limelight1826

Drummond1830

oxyhydrogen light1849

oxy-calcium light1859

calcium light1864

1864 Daily Tel. 4 Oct. A blinding ray from a calcium light apparatus.

1872 Daily News 7 Nov. Calcium lights shone on smiling multitudes.

Categories »

calcium oxide n. CaO, quick-lime.

calcium phosphate n. Ca₃(PO₄)₂ phosphate of lime, the chief constituent of bone-ash.

ΚΠ

1866 H. E. Roscoe Lessons Elem. Chem. xv. 131 When bones are burnt, a white solid mass is left behind; this is called Calcium Phosphate.

Categories »

calcium silicate n. CaSiO₃, found crystallized in tabular spar, etc.

Categories »

calcium sulphate n. CaSO₄, found crystallized as Gypsum.

This entry has not yet been fully updated (first published 1888; most recently modified version published online December 2021).

单词	calcium
释义	calciumn. Brit. /ˈkalsɪəm/, U.S. /ˈkælsiəm/ Etymology: < (by Sir H. Davy) Latin calx, calc(i)- lime, on the type of other names of metals in -ium suffix. Chemistry. A chemical element, one of the ‘metals of the alkaline earths’, being the basis of lime; though one of the most widely diffused of elements, it is found in nature only in composition, and was first separated by Davy in 1808, as a light yellow metal, ductile and malleable, about as hard as gold, which rapidly oxidizes in air containing moisture, and forms ‘quick-lime’. Symbol Ca. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > calcium > [noun] calcium1808 Ca1830 1808 H. Davy in Philos. Trans. (Royal Soc.) 98 346 I shall venture to denominate the metals from the alkaline earths barium, strontium, calcium, and magnium. 1815 W. Phillips Outl. Mineral. & Geol. (ed. 3) 25 Lime has been proved by Sir H. Davy..to be a metallic oxide, consisting of 28 per cent. of oxygen and 72 of calcium. 1878 T. H. Huxley Physiography (ed. 2) 81 A solid carbonate of calcium..more commonly termed carbonate of lime. 1881 Lockyer in Nature No. 614. 321/2 Those short common lines of calcium which for years past we had watched coming out of the salts of calcium when decomposition was taking place. Compounds General attributive = calcic adj.; as in calcium compounds, calcium salts, etc.; esp. calcium carbonate n. CaCO₃, carbonate of lime, or limestone, and arragonite. ΚΠ 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 370 Calcium carbonate is always precipitated. Categories » calcium chloride n. CaCl₂, chloride of lime, bleaching powder. Categories » calcium fluoride n. CaFl₂, fluor spar. calcium light n. the lime-light. ΘΚΠ the world > matter > light > firework > [noun] > limelight limelight1826 Drummond1830 oxyhydrogen light1849 oxy-calcium light1859 calcium light1864 1864 Daily Tel. 4 Oct. A blinding ray from a calcium light apparatus. 1872 Daily News 7 Nov. Calcium lights shone on smiling multitudes. Categories » calcium oxide n. CaO, quick-lime. calcium phosphate n. Ca₃(PO₄)₂ phosphate of lime, the chief constituent of bone-ash. ΚΠ 1866 H. E. Roscoe Lessons Elem. Chem. xv. 131 When bones are burnt, a white solid mass is left behind; this is called Calcium Phosphate. Categories » calcium silicate n. CaSiO₃, found crystallized in tabular spar, etc. Categories » calcium sulphate n. CaSO₄, found crystallized as Gypsum. This entry has not yet been fully updated (first published 1888; most recently modified version published online December 2021). < n.1808
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