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Thrace

(Encyclopedia) ThraceThracethrās [key], region, 3,310 sq mi (8,575 sq km), SE Europe, occupying the southeastern tip of the Balkan Peninsula and comprising NE Greece, S Bulgaria, and European Turkey…

culture

(Encyclopedia) culture, in anthropology, the integrated system of socially acquired values, beliefs, and rules of conduct which delimit the range of accepted behaviors in any given society. Cultural…

Dead Sea Scrolls

(Encyclopedia) Dead Sea Scrolls, ancient leather and papyrus scrolls first discovered in 1947 in caves on the NW shore of the Dead Sea. Most of the documents were written or copied between the 1st…

Arabs

(Encyclopedia) Arabs, name originally applied to the Semitic peoples of the Arabian Peninsula. It now refers to those persons whose primary language is Arabic. They constitute most of the population…

nitrogen

(Encyclopedia) nitrogennitrogennīˈtrəjən [key], gaseous chemical element; symbol N; at. no. 7; interval in which at. wt. ranges 14.00643–14.00728; m.p. −209.86℃; b.p. −195.8℃; density 1.25 grams per…

airship

(Encyclopedia) airship, an aircraft that consists of a cigar-shaped gas bag, or envelope, filled with a lighter-than-air gas to provide lift, a propulsion system, a steering mechanism, and a gondola…

Congo, river, Africa

(Encyclopedia) CongoCongokŏngˈgō [key] or ZaïreCongozīˈēr, zäērˈ [key], great river of equatorial Africa, c.2,720 mi (4,380 km) long, formed by the waters of the Lualaba River and its tributary, the…

knight

(Encyclopedia) knight, in ancient and medieval history, a noble who did military service as a mounted warrior. As the feudal system disintegrated, knight service was with growing frequency…

Sioux

(Encyclopedia) Sioux or Dakota, confederation of Native North American tribes, the dominant group of the Hokan-Siouan linguistic stock, which is divided into several separate branches (see Native…

logic

(Encyclopedia) logic, the systematic study of valid inference. A distinction is drawn between logical validity and truth. Validity merely refers to formal properties of the process of inference. Thus…