Columbia Encyclopedia

Search results

500 results found

Cretaceous period

(Encyclopedia)Cretaceous period krĭtāˈshəs [key], third and last period of the Mesozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from approximately 144 to 65 millio...

Paredes y Arrillaga, Mariano

(Encyclopedia)Paredes y Arrillaga, Mariano märyäˈnō pärāˈᵺās ē ärēyäˈgä [key], 1797–1849, Mexican general and president (1846). A leader of the ultraconservatives, he helped to put Antonio López ...

tortoise

(Encyclopedia)tortoise tôrˈtəs [key], common name for a terrestrial turtle, especially one of the family Testudinidae. Tortoises inhabit warm regions of all continents except Australia. They have club-shaped fee...

Gadsden Purchase

(Encyclopedia)Gadsden Purchase gădzˈdən [key], strip of land purchased (1853) by the United States from Mexico. The Treaty of Guadalupe Hidalgo (1848) had described the U.S.-Mexico boundary vaguely, and Presiden...

waterfowl

(Encyclopedia)waterfowl, common term for members of the order Anseriformes, wild, aquatic, typically freshwater birds including ducks, geese, and screamers. In Great Britain the term is also used to designate speci...

Slim Helú, Carlos

(Encyclopedia)Slim Helú, Carlos cärˈlōs slēm hēlo͞oˈ [key], 1940–, Mexican business executive. The son of a Lebanese Maronite immigrant who became a successful merchant and real-estate investor, Slim was ...

Donoso, José

(Encyclopedia)Donoso, José hōsāˈ dōnōˈsō [key], 1924–96, Chilean novelist and short-story writer, b. Santiago. He attended Princeton and taught there and at the Univ. of Iowa (1965–67). Donoso moved to ...

Walker, William

(Encyclopedia)Walker, William, 1824–60, American filibuster in Nicaragua, b. Nashville, Tenn. Walker, a qualified doctor, a lawyer, and a journalist by the time he was 24, sought a more adventurous career. After ...

alder

(Encyclopedia)alder ôlˈdər [key], name for deciduous trees and shrubs of the genus Alnus of the family Betulaceae (birch family), widely distributed, especially in mountainous and moist areas of the north temper...

alien

(Encyclopedia)alien, in law, any person residing in one political community while owing allegiance to another. A procedure known as naturalization permits aliens to become citizens. Each nation establishes conditio...