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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...

Kern

(Encyclopedia)Kern, river, 155 mi (249 km) long, rising in the S Sierra Nevada Mts., E Calif., and flowing south, then southwest to a reservoir in the extreme southern part of the San Joaquin valley. The river has ...

Red River, river, China and Vietnam

(Encyclopedia)Red River, Chinese Yuan Chiang, Vietnamese Song Hong, chief river of N Vietnam, 730 mi (1,175 km) long, rising in Yunnan prov., S China, and flowing southeast, in deep, narrow gorges, through N Vietna...

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...

Oka, river, Siberian Russia

(Encyclopedia)Oka, river, c.600 mi (970 km) long, rising in the Sayan Mts., Buryat Republic, S central Siberian Russia. It flows N through Irkutsk oblast to join the Angara River below Bratsk. The lower Oka valley ...

Torrens, Lake

(Encyclopedia)Torrens, Lake, shallow salt lake, 2,230 sq mi (5,776 sq km), central South Australia state, Australia. In a rift valley, it is 120 mi (193 km) long and is Australia's second largest lake. It becomes p...

Beracah

(Encyclopedia)Beracah bērāˈkə [key], in the Bible. 1 One who joined David at Ziklag. 2 Valley, N of Hebron, running roughly east-west. ...

Rezeph

(Encyclopedia)Rezeph rēˈzĕf [key], ancient city, probably to be identified with Rasafa, E of Palmyra in the Euphrates valley. It is mentioned in the Bible. ...

oxide

(Encyclopedia)oxide, chemical compound containing oxygen and one other chemical element. Oxides are widely and abundantly distributed in nature. Water is the oxide of hydrogen. Silicon dioxide is the major componen...

ruthenium

(Encyclopedia)ruthenium ro͞othēˈnēəm [key], metallic chemical element; symbol Ru; at. no. 44; at. wt. 101.07; m.p. about 2,310℃; b.p. about 3,900℃; sp. gr. 12.41 at 20℃; valence commonly +2, +3, +4, +6, ...