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Black Hills

(Encyclopedia)Black Hills, rugged mountains, c.6,000 sq mi (15,540 sq km), enclosed by the Belle Fourche and Cheyenne rivers, SW S.Dak. and NE Wyo., and rising c.2,500 ft (760 m) above the surrounding Great Plains;...

stonework

(Encyclopedia)stonework, term applied to various types of work—that of the lapidary who shapes, cuts, and polishes gemstones or engraves them for seals and ornaments; of the jeweler or artisan who mounts or encru...

Duke, James Buchanan

(Encyclopedia)Duke, James Buchanan, 1856–1925, American industrialist, processor of tobacco products, b. near Durham, N.C. The Civil War left the Duke family poor, but James and his brother, Benjamin, helped thei...

common-ion effect

(Encyclopedia)common-ion effect, decrease in solubility of an ionic salt, i.e., one that dissociates in solution into its ions, caused by the presence in solution of another solute that contains one of the same ion...

cyanide

(Encyclopedia)cyanide sīˈənīdˌ [key], chemical compound containing the cyano group, –CN. Cyanides are salts or esters of hydrogen cyanide (hydrocyanic acid, HCN) formed by replacing the hydrogen with a metal...

Hesiod

(Encyclopedia)Hesiod hēˈsēəd, hĕsˈ– [key], fl. 8th cent.? b.c., Greek poet. He is thought to have lived later than Homer, but there is no absolute certainty about the dates of his life. Hesiod portrays hims...

gonorrhea

(Encyclopedia)gonorrhea gŏnərēˈə [key], common infectious disease caused by a bacterium (Neisseria gonorrhoeae), involving chiefly the mucous membranes of the genitourinary tract. It may occasionally spread to...

Fugger

(Encyclopedia)Fugger fo͝ogˈər [key], German family of merchant princes. The foundation of their wealth was laid by Hans Fugger, allegedly a weaver, who moved to Augsburg in 1367. His descendants built up the fam...

Amphipolis

(Encyclopedia)Amphipolis ămfĭˈpəlĭs [key], ancient city of Macedonia, on the Strymon (Struma) River near the sea and NE of later Thessaloníki. The place was known as Ennea Hodoi [nine ways] before it was sett...

Kaaba

(Encyclopedia)Kaaba or Caaba both: käˈbə or käˈəbə [key] [Arab.,=cube], the central, cubic, stone structure, covered by a black cloth, within the Great Mosque in Mecca, Saudi Arabia. The sacred nature of the...