English definition of Copper

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Definition of copper

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Copper (n.) A common metal of a reddish color, both ductile and malleable, and very tenacious. It is one of the best conductors of heat and electricity. Symbol Cu. Atomic weight 63.3. It is one of the most useful metals in itself, and also in its alloys, brass and bronze..

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Malachite :: Malachite (n.) Native hydrous carbonate of copper, usually occurring in green mammillary masses with concentric fibrous structure..

Malay :: Malay (n.) One of a race of a brown or copper complexion in the Malay Peninsula and the western islands of the Indian Archipelago.

Touch-needle :: Touch-needle (n.) A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for trying the purity of articles of gold or silver by comparison of the streaks made by the article and the bar on a touchstone..

Tombac :: Tombac (n.) An alloy of copper and zinc, resembling brass, and containing about 84 per cent of copper; -- called also German, / Dutch, brass. It is very malleable and ductile, and when beaten into thin leaves is sometimes called Dutch metal. The addition of arsenic makes white tombac..

Fulguration :: Fulguration (n.) The sudden brightening of a fused globule of gold or silver, when the last film of the oxide of lead or copper leaves its surface; -- also called blick..

Saunders-blue :: Saunders-blue (n.) A kind of color prepared from calcined lapis lazuli; ultramarine; also, a blue prepared from carbonate of copper..

Condurrite :: Condurrite (n.) A variety of the mineral domeykite, or copper arsenide, from the Condurra mine in Cornwall, England..

Manilla :: Manilla (n.) A piece of copper of the shape of a horseshoe, used as money by certain tribes of the west coast of Africa..

Obolo :: Obolo (n.) A copper coin, used in the Ionian Islands, about one cent in value..

Coppering :: Coppering (p. pr. & vb. n.) of Coppe.

Kettledrum :: Kettledrum (n.) A drum made of thin copper in the form of a hemispherical kettle, with parchment stretched over the mouth of it..

Gong :: Gong (n.) An instrument, first used in the East, made of an alloy of copper and tin, shaped like a disk with upturned rim, and producing, when struck, a harsh and resounding noise..

Copper :: Copper (n.) A coin made of copper; a penny, cent, or other minor coin of copper..

Vitriol :: Vitriol (n.) A sulphate of any one of certain metals, as copper, iron, zinc, cobalt. So called on account of the glassy appearance or luster..

Venus :: Venus (n.) The metal copper; -- probably so designated from the ancient use of the metal in making mirrors, a mirror being still the astronomical symbol of the planet Venus..

Chalcographist :: Chalcographist (n.) An engraver on copper or brass; hence, an engraver of copper plates for printing upon paper..

Brass :: Brass (n.) An alloy (usually yellow) of copper and zinc, in variable proportion, but often containing two parts of copper to one part of zinc. It sometimes contains tin, and rarely other metals..

Coquimbite :: Coquimbite (n.) A mineral consisting principally of sulphate of iron; white copperas; -- so called because found in the province of Coquimbo, Chili..

Erinite :: Erinite (n.) A hydrous arseniate of copper, of an emerald-green color; -- so called from Erin, or Ireland, where it occurs..

Li :: Li (n.) A Chinese copper coin; a cash. See Cash.