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rudder

(Encyclopedia) rudder, mechanism for steering an airplane or a ship. In ships it is a flat-surfaced structure hinged to the stern and controlled by a helm. When the ship is on a straight course, the…

Yenisei

(Encyclopedia) YeniseiYeniseiyĕnĭsāˈ, 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…

Susquehanna

(Encyclopedia) SusquehannaSusquehannasəskwĭhănˈə [key], river, 444 mi (715 km) long, rising in Otsego Lake, at Cooperstown, N.Y., and zigzagging SE and SW through E central Pa. to Chesapeake Bay near…

Ruvuma

(Encyclopedia) RuvumaRuvumar&oomacr;v&oomacr;ˈmə [key], river, c.450 mi (724 km) long, rising in N Mozambique, near Lake Nyasa and flowing E to the Indian Ocean. It forms most of the Tanzania…

Pilcomayo

(Encyclopedia) PilcomayoPilcomayopēlkōmäˈyō [key], river c.1,000 mi (1,600 km) long, rising in the Bolivian Andes E of Lake Poopó and flowing SE in a marshy course across the Gran Chaco to the…

Kara

(Encyclopedia) KaraKarakärˈə [key], river, c.140 mi (230 km) long, NE European and NW Siberian Russia. It flows N from the N Urals into the Kara Sea, forming part of the traditional border between…

Conchos

(Encyclopedia) ConchosConchoskōnˈchōs [key], river, c.350 mi (560 km) long, rising in S Chihuahua state, N Mexico, and flowing N and NE to the Rio Grande. Dams along its middle course provide water…

Desaguadero

(Encyclopedia) DesaguaderoDesaguaderodāsägwäᵺāˈrō [key], river, c.200 mi (320 km) long, flowing SE from Lake Titicaca to Lake Poopó, W Bolivia. It is used for irrigation in its northern course. Its…

center

(Encyclopedia) center, in politics, a party following a middle course. The term was first used in France in 1789, when the moderates of the National Assembly sat in the center of the hall. It can…

Tobol

(Encyclopedia) TobolToboltəbôlˈ [key], river, c.1,050 mi (1,690 km) long, rising in the Mugodzhar Hills, NE Kazakhstan. It flows NE past Qostanay, into Russia, and past Kurgan to join the Irtysh…