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A hydrous sulphate of copper and lead, found in some parts of Caledonia or Scotland.

A composite stone (quartz, schorl, and hornlende) in the walls of tin and copper lodes.

An alloy of gold, silver, and copper, of which an inferior quality of jewerly is made.

A United States coin, the hundredth part of a dollar, formerly made of copper, now of copper, tin, and zinc.

A copper coin of Italy and Spain equivalent to a centime.

The hundredth part of a franc; a small French copper coin and money of account.

), having a variety of very sweet songs, and highly valued as a cage bird; -- called also copper finch.

Native copper sulphide, called also copper glance, and vitreous copper; a mineral of a black color and metallic luster. [Formerly written chalcosine.]

An engraver on copper or brass; hence, an engraver of copper plates for printing upon paper.

The act or art of engraving on copper or brass, especially of engraving for printing.

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

A hydrous silicate of copper, occurring massive, of a blue or greenish blue color.

ert. -- Composition metal, an alloy resembling brass, which is sometimes used instead of copper for sheathing vessels; -- also called Muntz metal and yellow metal. -- Composition of proportion (Math.), an arrangement of four proportionals so that the sum of the arrangement of four proportionals so that the sum of the…

A projectile constructed so as to take the grooves of a rifle by means of a soft copper band firmly attached near its base or, formerly, by means of an envelope of soft metal. In small arms the modern projectile, having a soft core and harder jacket, is subjected to compression throughout the entire cylindrical part.…

A variety of the mineral domeykite, or copper arsenide, from the Condurra mine in Cornwall, England.

A Russian copper coin. See Kopeck.

he dried meat of the cocoanut, from which cocoanut oil is expressed. [Written also cobra, copperah, coppra.]

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

ll particles of, as by action of a strong acid or a caustic alkali. Aqua fortis corroding copper . . . is wont to reduce it to a green- blue solution. Boyle.

A native sulphide of copper, occuring in masses of a dark blue color; -- hence called indigo copper.