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Ayeyarwady

(Encyclopedia)Ayeyarwady ĭrəwŏdˈē [key], chief river of Myanmar, c.1,000 mi (1,600 km) long, formed by the confluence of the Mali and Nmai rivers in N Myanmar. The combined stream flows south through gorges st...

Magdalena

(Encyclopedia)Magdalena mägᵺälāˈnä [key], river, c.1,000 mi (1,600 km) long, rising in the Cordillera Central, SW Colombia and flowing N to the Caribbean Sea near Barranquilla. It flows in a fault-block vall...

waterfall

(Encyclopedia)waterfall, a sudden unsupported drop in a stream. It is formed when the stream course is interrupted as when a stream passes over a layer of harder rock—often igneous—to an area of softer and ther...

Saint John, river, United States and Canada

(Encyclopedia)Saint John, river, 418 mi (673 km) long, rising in N Maine and flowing NE to New Brunswick, Canada, then SE below Edmundston, past St. Leonard, Grand Falls, Woodstock, and Fredericton to the Bay of Fu...

club moss

(Encyclopedia)club moss, name generally used for the living species of the class Lycopodiopsida, a primitive subdivision of vascular plants. The Lycopodiopsida were a dominant plant group in the Carboniferous perio...

mahogany

(Encyclopedia)mahogany, common name for the Meliaceae, a widely distributed family of chiefly tropical shrubs and trees, often having scented wood. The valuable hardwood called mahogany is obtained from many member...

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...

Mayweather, Floyd, Jr.

(Encyclopedia)Mayweather, Floyd, Jr., 1977–, American boxer, b. Grand Rapids, Mich., as Floyd Joy Sinclair. He began boxing at an early age, coached by his father, a welterweight boxer whose name he subsequently ...

Yenisei

(Encyclopedia)Yenisei yĕnĭsāˈ, Rus. yĕnyĭsyāˈ [key], chief river of Siberia, c.2,500 mi (4,020 km) long, central Siberian Russia. It is formed at Kyzyl, Tuva Republic, by the junction of the Bolshoi Yenisei...

Iowa, state, United States

(Encyclopedia)CE5 Iowa īˈəwə [key], midwestern state in the N central United States. It is bounded by the Mississippi River, across which lie Wisconsin and Illinois (E); Missouri (S); Nebraska and South Dako...