| chalco-, chalc- (Greek: copper; brass).chalcidid: A small wasp with bright metallic (copper) coloration whose larvae are often parasites of other insects in various states of life. 
 Chalcididae: A family of flies; so called from their copperlike color.
 chalcocite: A gray to black brittle copper sulfide (Cu2S) that is an important ore of copper.
 chalcogen: In inorganic chemistry, a term for any of the elements that are part of Group VIB of the periodic table: oxygen, sulfur, selenium, tellurium, or polonium.
 chalcogenide: In inorganic chemistry, a compound made up of a chalcogen (oxygen, sulfur, selenium, tellurium, or polonium) and a more electropositive element.
 chalcography, chalcographic: The act of engraving on copper or brass.
 chalcographer, chalcographist: Someone one who engraves on copper or brass.
 chalcolithic: Belonging or relating to the transitional period between the Neolithic and Bronze ages, beginning around 400 B.C., when the use of copper became more prevalent.
 chalcophile, chalcophilic: In geochemistry, an element having a strong affinity for sulfur, and therefore tending to be more abundant in sulfide minerals and ores than in other types of rock.
 chalcopyrite: An important copper mineral found in medium- to high-temperature sulfide ore deposits; a brassy yellow sulfide (CuFeS2) of copper and iron that is the commonest ore of copper.
 chalicosis: 1. Chronic copper poisoning; also, chalcitis, chalkitis [inflammation of the eyes caused by rubbing the eyes after the hands have been used on brass].  2. The presence of copper deposits in the tissues. 3. A deposit of copper particles in the lungs or in other tissues. chalcostibite: An antimony copper sulfide.
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