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Arsenical iron pyrites; arsenopyrite.

Iron pyrites, or arsenical pyrites; -- so called by the Cornish miners.

sulphide containing more sulphur than some other compound of the same elements; as, iron pyrites is a persulphide; -- formerly called persulphuret.

Of or pertaining to pyrites. See Pyritic.

s-yellow color and brilliant metallic luster, crystallizing in the isometric system; iron pyrites; iron disulphide. Hence sable coal his massy couch extends, And stars of gold the sparkling pyrite blends. E. Darwin.

Of or pertaining to pyrites; consisting of, or resembling, pyrites.

Containing or producing pyrites.

To convert into pyrites.

Like pyrites in hemihedral form.

lphide of iron, and is remarkable for being attracted by the magnet. Called also magnetic pyrites.

Containing, or impregnated with, selenium; as, seleniferous pyrites.

element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast beds mixed with gypsum and various earthy materials, from which it is melted out. Symbol S. Atomic weight 32. The specific gravity of ordinary octohedral s…

A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.…

dig in tin mines. [Obs.] Bailey. -- Tin plate, thin sheet iron coated with tin. -- Tin pyrites. See Stannite.

Letter. (b) A kind of gunlock in which sparks were struck from a flint, or piece of iron pyrites, by a revolving wheel. (c) A kind of brake a carriage. -- Wheel ore (Min.), a variety of bournonite so named from the shape of its twin crystals. See Bournonite. -- Wheel pit (Steam Engine), a pit in the ground, in which…

silvery-white cast iron containing a large proportion of combined carbon. -- White iron pyrites (Min.), marcasite. -- White land, a tough clayey soil, of a whitish hue when dry, but blackish after rain. [Eng.] -- White lark (Zoöl.), the snow bunting. -- White lead. (a) A carbonate of lead much used in painting, and…

n; -- 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 præcox), sometimes grown as a salad plant. -- Yellow dock. (Bot.) See the Note under Dock. -- Yellow earth, a yellowish clay, col…