Columbia Encyclopedia

Search results

500 results found

plow

(Encyclopedia)plow or plough, agricultural implement used to cut furrows in and turn up the soil, preparing it for planting. The plow is generally considered the most important tillage tool. Its beginnings in the B...

airport

(Encyclopedia)airport or airfield, place for landing and departure of aircraft, usually with facilities for housing and maintaining planes and for receiving and discharging passengers and cargo. There are about 16,...

Stuttgart, city, Germany

(Encyclopedia)Stuttgart shto͝otˈgärt [key], city (1994 pop. 594,406), capital of Baden-Württemberg, SW Germany, on the Neckar River. It is a major transportation point, with a large river port and an internatio...

wapiti

(Encyclopedia)wapiti wŏpˈĭtē [key], large North American deer, Cervus canadensis, closely related to the Old World red deer. It is commonly called elk in America although the name elk is used in Europe to refer...

Tripoli , city, Libya

(Encyclopedia)Tripoli trĭpˈəlē [key], ancient Oea, Arab. Tarabulus, city (1984 pop. 990,697), capital of Libya and of Tripoli dist., NW Libya, a port on the Mediterranean Sea. It is a commercial, industrial, ad...

Toledo , city, United States

(Encyclopedia)Toledo təlēˈdō [key], city (1990 pop. 332,943), seat of Lucas co., NW Ohio, on the Maumee River at its junction with Lake Erie; inc. 1837. With a natural harbor and its railroads and highways, Tol...

boiling point

(Encyclopedia)boiling point, temperature at which a substance changes its state from liquid to gas. A stricter definition of boiling point is the temperature at which the liquid and vapor (gas) phases of a substanc...

Santa Fe, city, United States

(Encyclopedia)Santa Fe sănˈtə fā [key], city (1990 pop. 55,859), alt. c.7,000 ft (2,130 m), state capital and seat of Santa Fe co., N N.Mex., at the foot of the Sangre de Cristo Mts. It is an administrative, to...

number

(Encyclopedia)number, entity describing the magnitude or position of a mathematical object or extensions of these concepts. A real or complex number z is called algebraic if it is the root of a polynomial equati...

lens, in optics

(Encyclopedia)CE5 Lenses lens, device for forming an image of an object by the refraction of light. In its simplest form it is a disk of transparent substance, commonly glass, with its two surfaces curved or wi...