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fall line

(Encyclopedia) fall line, boundary between an upland region and a coastal plain across which rivers from the upland region drop to the plain as falls or rapids. A fall line is formed in an area where the rivers have...

jackrabbit

(Encyclopedia) jackrabbit, popular name for several hares of W North America, characterized by very long legs and ears. Jackrabbits are powerful jumpers and fast runners. In normal progress leaps are alternated with...

river

(Encyclopedia) river, stream of water larger than a brook or creek. Land surfaces are never perfectly flat, and as a result the runoff after precipitation tends to flow downward by the shortest and steepest course i...

United States, Great Seal of the

(Encyclopedia) United States, Great Seal of the, official impression that validates a United States government document. It was adopted by the Continental Congress in 1782 and, with only minor changes in the design,...

crayfish

(Encyclopedia) crayfish or crawfish, freshwater crustacean smaller than but structurally very similar to its marine relative the lobster, and found in ponds and streams in most parts of the world except Africa. Cray...

Senegal, river, Africa

(Encyclopedia) Senegal sĕnĭgôlˈ, sĕnˈĭgôl [key], river, c.1,000 mi (1,610 km) long, formed in SW Mali, W Africa, by the confluence of the Bafing and Bakoy rivers, both of which rise in the Fouta Djallon, N G...

Omaha, city, United States

(Encyclopedia) Omaha ōˈməhä, –hô [key], city (1990 pop. 335,795), seat of Douglas co., E Nebr., on the west bank of the Missouri River; inc. 1857. The largest city in the state, it is a busy port of entry and...
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