Columbia Encyclopedia

Search results

500 results found

kite, in aviation and recreation

(Encyclopedia)kite, in aviation, aircraft restrained by a towline and deriving its lift from the aerodynamic action of the wind flowing across it. Commonly the kite consists of a light framework upon which paper, s...

Kivu, lake, Congo and Rwanda

(Encyclopedia)Kivu, lake, 1,042 sq mi (2,699 sq km), 55 mi (89 km) long, on the Congo-Rwanda border, E central Africa; highest lake in Africa (4,788 ft/1,459 m). It is drained by the Ruzizi River, which flows S int...

Laccadive, Minicoy, and Amindivi Islands

(Encyclopedia)Laccadive, Minicoy, and Amindivi Islands, India: see Lakshadweep. ...

Aratus, Greek statesman and general

(Encyclopedia)Aratus, d. 213 b.c., Greek statesman and general of Sicyon, prime mover and principal leader of the Second Achaean League. His objective at first was to free the Peloponnesus from Macedonian dominatio...

pole, in electricity and magnetism

(Encyclopedia)pole, in electricity and magnetism, point where electric or magnetic force appears to be concentrated. A single electric charge located at a point is sometimes referred to as an electric monopole. An ...

pre-Columbian art and architecture

(Encyclopedia)pre-Columbian art and architecture, works of art and structures created in Central and South America before the arrival of Europeans in the Western Hemisphere. For many years the regions that are now ...

centripetal force and centrifugal force

(Encyclopedia)CE5 Centripetal and centrifugal forces: When a ball is swung in a circle at the end of a string, centripetal and centrifugal forces act as shown above. centripetal force and centrifugal force, act...

Camp Fire Boys and Girls

(Encyclopedia)Camp Fire Boys and Girls, American organization for boys and girls from birth to age 21, originally the Camp Fire Girls, for girls 6 to 18 years old. It was founded (1910) by Luther Halsey Gulick (186...

age grade and age set

(Encyclopedia)age grade and age set, differentiation of social role based on age, commonly found in small-scale societies of North America and East Africa. Age sets are a type of sodality (nonresidential groups tha...

Braintree, town and district, England

(Encyclopedia)Braintree, town and district, Essex, E England, between the Pant (Blackwater) and Brain river valleys. It has textile, plastic, and metal-product indust...