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acropolis

(Encyclopedia)acropolis əkrŏpˈəlĭs [key] [Gr.,=high point of the city], elevated, fortified section of various ancient Greek cities. The Acropolis of Athens, a hill c.260 ft (80 m) high, with a flat oval top c...

dust, atmospheric

(Encyclopedia)dust, atmospheric, minute particles slowly settling or suspended by slight currents and existing in varying amounts in all air. There is least dust at high levels over the ocean and most at low levels...

Ghiberti, Lorenzo

(Encyclopedia)Ghiberti, Lorenzo lōrĕnˈtsō gēbĕrˈtē [key], c.1378–1455, Florentine sculptor. He received his early training in the workshop of Bartoluccio. In 1401 he entered the competition for a bronze p...

sewerage

(Encyclopedia)sewerage, system for the removal and disposal of chiefly liquid wastes and of rainwater, which are collectively called sewage. The average person in the industrialized world produces between 60 and 14...

coal mining

(Encyclopedia)coal mining, physical extraction of coal resources to yield coal; also, the business of exploring for, developing, mining, and transporting coal in any form. Coal has been historically important indus...

Sun Belt

(Encyclopedia)Sun Belt or Sunbelt, southern tier of the United States, focused on Florida, Texas, Arizona, and California, and extending as far north as Virginia. The term gained wide use in the 1970s, when the eco...

São Paulo

(Encyclopedia)São Paulo souN pouˈ lo͝o [key], state (1996 pop. 34,055,715), 95,713 sq mi (247,897 sq km), SE Brazil. It is Brazil's most populous and economically important state. The capital is the city of São...

Denver

(Encyclopedia)Denver, city (2020 pop. 715,522), alt. 5,280 ft (1,609 m), state capital, coextensive with Denver co., N central Colo., on a plateau at the foot of the ...

swamp

(Encyclopedia)swamp, shallow body of water in a low-lying, poorly drained depression, usually containing abundant plant growth dominated by trees, such as cypress, and high shrubs. Swamps develop in moist climates,...

Thames , river, England

(Encyclopedia)Thames tĕmz [key], Rom. Tamesis, principal river of England, c.210 mi (340 km) long. It rises in four headstreams (the Thames or Isis, Churn, Coln, and Leach) in the Cotswold Hills, E Gloucestershire...