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Washington, George

(Encyclopedia)Washington, George, 1732–99, 1st President of the United States (1789–97), commander in chief of the Continental army in the American Revolution, called the Father of His Country. The Univ. of V...

endocrine system

(Encyclopedia)endocrine system ĕnˈdəkrĭn [key], body control system composed of a group of glands that maintain a stable internal environment by producing chemical regulatory substances called hormones. The end...

hydrogen

(Encyclopedia)hydrogen hīˈdrəjən [key] [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; interval in which at. wt. ranges 1.00784–1.00811; m.p. −259.14℃; b.p. −252.87℃; density 0.08...

Flemish art and architecture

(Encyclopedia)Flemish art and architecture, works of art and structures produced in the region of Europe known for centuries as Flanders. Netherlandish art is another term sometimes used for these works. Art produc...

black hole

(Encyclopedia)black hole, in astronomy, celestial object of such extremely intense gravity that it attracts everything near it and in some instances prevents everything, including light, from escaping. The term was...

sulfuric acid

(Encyclopedia)sulfuric acid, chemical compound, H2SO4, colorless, odorless, extremely corrosive, oily liquid. It is sometimes called oil of vitriol. Although sulfuric acid is now one of the most widely used c...

Zambia

(Encyclopedia)CE5 Zambia zămˈbēə [key], officially Republic of Zambia, republic (2015 est. pop. 15,066,000), 290,584 sq mi (752,614 sq km), central Africa. It borders on Congo (Kinshasa) in the north, on Tan...

Utah , state, United States

(Encyclopedia)CE5 Utah yo͞oˈtäˌ [key], Rocky Mt. state of the W United States. It is bordered by Idaho and Wyoming (N), Colorado (E), Arizona (S), and Nevada (W), and touches New Mexico in the SE, at the Fou...

Russian literature

(Encyclopedia)Russian literature, literary works mainly produced in the historic area of Russia, written in its earliest days in Church Slavonic and after the 17th cent. in the Russian language. During World War ...

Gaza Strip

(Encyclopedia)Gaza Strip gäzˈə [key], rectangular coastal area, c.140 sq mi (370 sq km), SW Asia, on the ...