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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Copperworm :: Copperworm (n.) The teredo; -- so called because it injures the bottoms of vessels, where not protected by copper..

Copperish :: Copperish (a.) Containing, or partaking of the nature of, copper; like copper; as, a copperish taste..

Wet :: Wet (superl.) Employing, or done by means of, water or some other liquid; as, the wet extraction of copper, in distinction from dry extraction in which dry heat or fusion is employed..

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

Cyanosite :: Cyanosite (n.) Native sulphate of copper. Cf. Blue vitriol, under Blue..

Frankfort Black :: Frankfort black () A black pigment used in copperplate printing, prepared by burning vine twigs, the lees of wine, etc..

Norwegium :: Norwegium (n.) A rare metallic element, of doubtful identification, said to occur in the copper-nickel of Norway..

Coppersmith :: Coppersmith (n.) One whose occupation is to manufacture copper utensils; a worker in copper.

Misy :: Misy (n.) An impure yellow sulphate of iron; yellow copperas or copiapite.

Aurichalcite :: Aurichalcite (n.) A hydrous carbonate of copper and zinc, found in pale green or blue crystalline aggregations. It yields a kind of brass on reduction..

Plack :: Plack (n.) A small copper coin formerly current in Scotland, worth less than a cent..

Niccolite :: Niccolite (n.) A mineral of a copper-red color and metallic luster; an arsenide of nickel; -- called also coppernickel, kupfernickel..

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

Chalcopyrite :: Chalcopyrite (n.) Copper pyrites, or yellow copper ore; a common ore of copper, containing copper, iron, and sulphur. It occurs massive and in tetragonal crystals of a bright brass yellow color..

Bullion :: Bullion (n.) Showy metallic ornament, as of gold, silver, or copper, on bridles, saddles, etc..

Pile :: Pile (n.) A vertical series of alternate disks of two dissimilar metals, as copper and zinc, laid up with disks of cloth or paper moistened with acid water between them, for producing a current of electricity; -- commonly called Volta's pile, voltaic pile, or galvanic pile..

Bournonite :: Bournonite (n.) A mineral of a steel-gray to black color and metallic luster, occurring crystallized, often in twin crystals shaped like cogwheels (wheel ore), also massive. It is a sulphide of antimony, lead, and 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..

Brochantite :: Brochantite (n.) A basic sulphate of copper, occurring in emerald-green crystals..

Bajocco :: Bajocco (n.) A small copper coin formerly current in the Roman States, worth about a cent and a half..