the office or rank of chairman.
(of a chemical element in the earth) having an affinity for sulfur. a chalcophile element.
a very common mineral, copper iron sulfide, CuFeS 2 , occurring in brass-yellow crystals or masses: the most important ore of copper; copper pyrites. noun a widely distributed yellow mineral consisting of a sulphide of copper and iron in tetragonal crystalline form: the principal ore of copper. Formula: CuFeS2 Also called copper pyrites chalcopyrite (kāl’kə-pī’rīt’) […]
chalcosis chal·co·sis (kāl-kō’sĭs) n. Chronic copper poisoning. A deposit of fine particles of copper in the lungs or other tissues.
a mineral, antimony copper sulfide, CuSbS 2 , occurring in lead-gray crystals.