Columbia Encyclopedia

Search results

268 results found

almanac

(Encyclopedia)almanac, originally, a calendar with notations of astronomical and other data. Almanacs have been known in simple form almost since the invention of writing, for they served to record religious feasts...

Aral Sea

(Encyclopedia)Aral Sea ărˈəl [key], salt lake, SW Kazakhstan and NW Uzbekistan, E of the Caspian Sea in an area of interior drainage. To the north and west are the edges of the arid Ustyurt Plateau; the Kyzyl Ku...

space probe

(Encyclopedia)space probe, space vehicle carrying sophisticated instrumentation but no crew, designed to explore various aspects of the solar system (see space exploration). Unlike an artificial satellite, which is...

transportation

(Encyclopedia)transportation, conveyance of goods and people over land, across water, and through the air. See also commerce. The first practical attempts at air transportation began with the invention of the h...

submersible

(Encyclopedia)submersible, small, mobile undersea research vessel capable of functioning in the ocean depths. Development of a great variety of submersibles during the later 1950s and 1960s came about as a result o...

sailing

(Encyclopedia)sailing, as a sport, the art of navigating a sailboat for recreational or competitive purposes. Although sailing as a means of transportation predates history, sport sailing—or yachting—seems to...

aphid

(Encyclopedia)aphid or plant louse, tiny, usually green, soft-bodied, pear-shaped insect injurious to vegetation. It is also called greenfly and blight. Aphids are mostly under 1⁄4 in. (6 mm) long. Some are wingl...

body temperature

(Encyclopedia)body temperature, internal temperature of a living organism. Mammals and birds are termed warm-blooded, or homeothermic, i.e., they are able to maintain a relatively constant inner body temperature, w...

tiger

(Encyclopedia)tiger, large carnivore of the cat family, Panthera tigris, found in the forests of Asia. There are six subspecies of P. tigris: Amur or Siberian, Sumatran, Malayan, North Indochinese, Bengal, and Sout...

depression, in economics

(Encyclopedia)depression, in economics, period of economic crisis in commerce, finance, and industry, characterized by falling prices, restriction of credit, low output and investment, numerous bankruptcies, and a ...