Columbia Encyclopedia

(Encyclopedia) Pittsburgh pĭtsˈbərg [key], city (1990 pop. 369,879), seat of Allegheny co., SW Pa., at the confluence of the Allegheny and the Monongahela rivers, which there form the Ohio River; inc. 1816. A maj...

(Encyclopedia) Phoenix, city (1990 pop. 983,403), state capital and seat of Maricopa co., S Ariz., on the Salt River; inc. 1881. It is the largest city in Arizona, the hub of the rich agricultural region of the Salt...

(Encyclopedia) cooking, the process of using heat to prepare foods for consumption. Many common cooking methods involve the use of oil. Frying is cooking in hot oil; sautéing is cooking in a small amount of oil; st...

(Encyclopedia) Jacksonville. 1 City (1990 pop. 29,101), Pulaski co., central Ark., inc. 1941. The city has varied industries, including printing and publishing and the manufacture of electronic equipment, ordnance, ...

(Encyclopedia) Providence, city (1990 pop. 160,728), state capital and seat of Providence co., NE R.I., a port at the head of Providence Bay; founded by Roger Williams 1636, inc. as a city 1832. The largest city in ...

(Encyclopedia) friction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a locomotive could not...

(Encyclopedia) Ai Weiwei īˈ wāwā [key], 1957–, Chinese artist, architect, filmmaker, and political activist. He is the son of poet Ai Ch'ing, who was internally exiled (1958–76) to work camps with his family...

(Encyclopedia) lithography lĭthŏgˈrəfē [key], type of planographic or surface printing. It is distinguished from letterpress (relief) printing and from intaglio printing (in which the design is cut or etched in...

(Encyclopedia) dentistry, treatment and care of the teeth and associated oral structures. Dentistry is mainly concerned with tooth decay, disease of the supporting structures, such as the gums, and faulty positionin...

(Encyclopedia) canoe kəno͞oˈ [key], long, narrow watercraft with sharp ends originally used by most peoples. It is usually propelled by means of paddles, although sails and, more recently, outboard motors are als...