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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.

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. [Formerly written also turcois, and turkois.]

cent mineral of a green color and pearly or vitreous luster. It is a hydrous arseniate of copper.

A general term for the uranium phosphates, autunite, or lime uranite, and torbernite, or copper uranite.

close place; also, the place itself. (b) (Chem.) A small metallic drying oven, usually of copper, for drying and heating filter papers, precipitates, etc.; -- called also air bath. A modified form is provided with a jacket in the outside partition for holding water, or other volatile liquid, by which the temperature ma…

Chromate of copper and lead, of various shades of green.

Consisting of, or pertaining to, copper, formerly called by chemists Venus. [Obs.] Boyle.

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. [Archaic]

poisonous substance used as a pigment and drug, obtained by the action of acetic acid on copper, and consisting essentially of a complex mixture of several basic copper acetates.

one of two pigments (called blue verditer, and green verditer) which are made by treating copper nitrate with calcium carbonate (in the form of lime, whiting, chalk, etc.) They consist of hydrated copper carbonates analogous to the minerals azurite and malachite. Verditer blue, a pale greenish blue color, like that of…

trust Of secrecy. Milton. Horned viper. (Zoöl.) See Cerastes. -- Red viper (Zoöl.), the copperhead. -- Viper fish (Zoöl.), a small, slender, phosphorescent deep-sea fish (Chauliodus Sloanii). It has long ventral and dorsal fins, a large mouth, and very long, sharp teeth. -- Viper's bugloss (Bot.), a rough-leaved bi…

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

A supposed element, afterward found to be a mixture of several metals, as copper, iron, lead, nickel, etc.

small six-sided tabular crystals of a green or yellow color. It is a hydrous vanadate of copper and lime.

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.

Any one of several white alloys, as pewter, britannia, etc. (b) (Metal.) A fine grade of copper sulphide obtained at a certain stage in copper smelting. -- White miller. (Zoöl.) (a) The common clothes moth. (b) A common American bombycid moth (Spilosoma Virginica) which is pure white with a few small black spots; --…

an arsenide of copper from Lake Superior.

lily of the valley. -- Wood lock (Naut.), a piece of wood close fitted and sheathed with copper, in the throating or score of the pintle, to keep the rudder from rising. -- Wood louse (Zoöl.) (a) Any one of numerous species of terrestrial isopod Crustacea belonging to Oniscus, Armadillo, and related genera. See Sow b…

llow-hammer. -- Yellow cat (Zoöl.), a yellow catfish; especially, the bashaw. -- Yellow copperas (Min.), a hydrous sulphate of iron; -- called also copiapite. -- Yellow copper ore, a sulphide of copper and iron; copper pyrites. See Chalcopyrite. -- Yellow cress (Bot.), a yellow-flowered, cruciferous plant (Barbarea…

y in the north of England. Yorkshire grit, a kind of stone used for polishing marble, and copperplates for engravers. Simmonds. -- Yorkshire pudding, a batter pudding baked under meat.