Columbia Encyclopedia

Search results

256 results found

blast furnace

(Encyclopedia)CE5 Blast furnace for production of iron blast furnace, structure used chiefly in smelting. The principle involved in this means of extracting metals is that of the reduction of the ores by the ac...

Guadeloupe

(Encyclopedia)CE5 Guadeloupe gwädəlo͞opˈ [key], overseas department and administrative region of France (2015 est. pop. 450,000), 687 sq mi (1,779 sq km), in the Leeward Islands, West Indies. The department ...

Oligocene epoch

(Encyclopedia)Oligocene epoch ŏlˈəgōsēnˌ [key], third epoch of the Tertiary period in the Cenozoic era of geologic time, lasting from 38 to 24 million years ago. More of North America was dry land during the ...

natural gas

(Encyclopedia)natural gas, natural mixture of gaseous hydrocarbons found issuing from the ground or obtained from specially driven wells. The composition of natural gas varies in different localities. Its chief com...

carbonate

(Encyclopedia)carbonate kärˈbənātˌ, –nət [key], chemical compound containing the carbonate radical or ion, CO3−2. Most familiar carbonates are salts that are formed by reacting an inorganic base (e.g., a ...

Michigan, Lake

(Encyclopedia)Michigan, Lake, 22,178 sq mi (57,441 sq km), 307 mi (494 km) long and 30 to 120 mi (48–193 km) wide, bordered by Mich., Ind., Ill., and Wis.; third largest of the Great Lakes and the only one entire...

Everglades

(Encyclopedia)Everglades, marshy, low-lying subtropical savanna area, c.4,000 sq mi (10,000 sq km), S Fla., extending from Lake Okeechobee S to Florida Bay. Characterized by water, sawgrass, hammocks (islandlike ma...

Transcarpathian Region

(Encyclopedia)Transcarpathian Region trănzˌcärpāˈthēən [key], Ukr. Zarkarpattya Oblast or Zakarpats'ka Oblast, Rus. Zakarpatskaya Oblast, administrative region (1989 pop. 1,252,000), 4,981 sq mi (12,901 sq k...

Baluchistan

(Encyclopedia)Baluchistan bəlôˈ– [key], province (2017 provisional pop. 12,344,408), c.134,000 sq mi (347,000 sq km), Pakistan. The country's largest and least populous province, it is bounded by Iran on the w...

Winchester, cities, United States

(Encyclopedia)Winchester wĭnˈchĕˌstər, wĭnˈchĭstər [key]. 1 Town (1990 pop. 11,524), Litchfield co., NW Conn., in the Litchfield Hills; settled 1732, inc. 1771. It includes Winsted (1990 pop. 8,254), an in...