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Acts of the Apostles

(Encyclopedia)Acts of the Apostles, book of the New Testament. It is the only 1st-century account of the expansion of Christianity in its earliest period. It was written in Greek anonymously as early as c.a.d. 65, ...

Roebling, John Augustus

(Encyclopedia)Roebling, John Augustus rōˈblĭng [key], 1806–69, German-American engineer, b. Mulhouse. He studied engineering in Berlin and in 1831 came to the United States. He demonstrated the practicability ...

courtly love

(Encyclopedia)courtly love, philosophy of love and code of lovemaking that flourished in France and England during the Middle Ages. Although its origins are obscure, it probably derived from the works of Ovid, vari...

Clyde

(Encyclopedia)Clyde, principal river of SW Scotland, 106 mi (171 km) long, rising in the Southern Uplands and flowing generally NW through Glasgow to the Firth of Clyde. It drains c.1,480 sq mi (3,830 sq km). The l...

hardness

(Encyclopedia)hardness, property of matter commonly described as the resistance of a substance to being scratched by another substance. The degree of hardness is relative, different substances being compared with o...

Idaho

(Encyclopedia)CE5 Idaho īˈdəhō [key], one of the Rocky Mt. states in the NW United States. It is bordered by Montana and Wyoming (E), Utah and Nevada (S), Oregon and Washington (W), and the Canadian province...

Lowell

(Encyclopedia)Lowell, city (1990 pop. 103,439), a seat of Middlesex co., NE Mass., at the confluence of the Merrimack and Concord rivers; settled 1653, set off from Chelmsford 1826, inc. as a city 1836. High-techno...

Kisangani

(Encyclopedia)Kisangani kēsangäˈnē [key], formerly Stanleyville, city (1996 est. pop. 500,000), capital of Tshopo prov., N central Congo (Kinshasa), a port on the Congo River. The city is the terminus of steame...

Rudolph, Paul Marvin

(Encyclopedia)Rudolph, Paul Marvin, 1918–97, American modernist architect, b. Elkton, Ky. Rudolph taught at several universities and served as chair of the Yale architecture department from 1958–65. He was one ...

defoliant

(Encyclopedia)defoliant, any one of several chemical compounds that, when applied to plants, can alter their metabolism, causing the leaves to drop off. In agriculture defoliants are used to eliminate the leaves of...