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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Galvanograph :: Galvanograph (n.) A copperplate produced by the method of galvanography; also, a picture printed from such a plate..

Centesimo :: Centesimo (n.) A copper coin of Italy and Spain equivalent to a centime.

Daguerreotype :: Daguerreotype (n.) An early variety of photograph, produced on a silver plate, or copper plate covered with silver, and rendered sensitive by the action of iodine, or iodine and bromine, on which, after exposure in the camera, the latent image is developed by the vapor of mercury..

Turnbull''s Blue :: Turnbull's blue () The double cyanide of ferrous and ferric iron, a dark blue amorphous substance having a coppery luster, used in dyeing, calico printing, etc. Cf. Prussian blue, under Prussian..

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..

Capel :: Capel (n.) A composite stone (quartz, schorl, and hornblende) in the walls of tin and copper lodes..

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

Liroconite :: Liroconite (n.) A hydrated arseniate of copper, occurring in obtuse pyramidal crystals of a sky-blue or verdigris-green color..

Copper-bottomed :: Copper-bottomed (a.) Having a bottom made of copper, as a tin boiler or other vessel, or sheathed with copper, as a ship..

Aich's Metal :: Aich's metal () A kind of gun metal, containing copper, zinc, and iron, but no tin..

Sou :: Sou (n.) An old French copper coin, equivalent in value to, and now displaced by, the five-centime piece (/ of a franc), which is popularly called a sou..

Leede :: Leede (n.) A caldron; a copper kettle.

Matte :: Matte (n.) A partly reduced copper sulphide, obtained by alternately roasting and melting copper ore in separating the metal from associated iron ores, and called coarse metal, fine metal, etc., according to the grade of fineness. On the exterior it is dark brown or black, but on a fresh surface is yellow or bronzy in color..

Ehlite :: Ehlite (n.) A mineral of a green color and pearly luster; a hydrous phosphate of copper.

Turquois :: Turquois (n.) A hydrous phosphate of alumina containing a little copper; calaite. It has a blue, or bluish green, color, and usually occurs in reniform masses with a botryoidal surface..

Kingston Metal :: Kingston metal () An alloy of tin, copper, and mercury, sometimes used for the bearings and packings of machinery..

Britannia :: Britannia (n.) A white-metal alloy of tin, antimony, bismuth, copper, etc. It somewhat resembles silver, and is used for table ware. Called also Britannia metal..

Eucairite :: Eucairite (n.) A metallic mineral, a selenide of copper and silver; -- so called by Berzelius on account of its being found soon after the discovery of the metal selenium..

Denier :: Denier (n.) A small copper coin of insignificant value.

Sheet :: Sheet (v. t.) A broad, thinly expanded portion of metal or other substance; as, a sheet of copper, of glass, or the like; a plate; a leaf..