English to English Dictionary -pyrites;

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Arsenopyrite :: Arsenopyrite (n.) A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called arsenical pyrites and mispickel..

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..

Leucopyrite :: Leucopyrite (n.) A mineral of a color between white and steel-gray, with a metallic luster, and consisting chiefly of arsenic and iron..

Melampyrite :: Melampyrite (n.) The saccharine substance dulcite; -- so called because found in the leaves of cowwheat (Melampyrum). See Dulcite.

Pyrite :: Pyrite (n.) A common mineral of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system; iron pyrites; iron disulphide..

Pyrites :: Pyrites (pl. ) of Pyrit.

Pyrites :: Pyrites (n.) A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color..