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Northrop, John Knudson

(Encyclopedia)Northrop, John Knudson, 1895–1981, American aviation pioneer, inventor, and executive, b. Newark, N.J. He worked for the Loughead Aircraft Manufacturing Co. (1916–20) as a draftsman, designing sea...

mamba

(Encyclopedia)mamba, name for African snakes of the genus Dendroaspis, in the cobra family. Widely distributed throughout Africa except in the deserts, mambas have extremely toxic venom. When attacking they raise t...

pipit

(Encyclopedia)pipit, common name for a group of chiefly Eurasian and African birds that together with the wagtails constitute a subfamily of songbirds related to the Old World warblers and thrushes. Pipits are trim...

Capitoline Hill

(Encyclopedia)Capitoline Hill kăpˈĭtəlīnˌ [key] or Capitol, highest of the seven hills of ancient Rome, historic and religious center of the city. The great temple of Jupiter Capitolinus, on its southern summ...

Roth, Joseph

(Encyclopedia)Roth, Joseph or Józef yōˈzĕf rōt [key], 1894–1939, Austrian novelist, essayist, journalist, and publisherb. Brody, Galicia. An outspoken critic of Hitler and militarism, he moved to Paris in 19...

balloon

(Encyclopedia)balloon, lighter-than-air craft without a propulsion system, lifted by inflation of one or more containers with a gas lighter than air or with heated air. During flight, altitude may be gained by disc...

limpkin

(Encyclopedia)limpkin or courlan ko͝orˈlən [key], common terms for a long-legged, nonmigratory marsh bird, considered the connecting evolutionary link between the crane and the rail. They have a cranelike skelet...

Pitol, Sergio

(Encyclopedia)Pitol, Sergio (Sergio Pitol Deméneghi), 1933–2018, Mexican author, essayist, and translator, b. Puebla. He studied law and literature at the National Autonomous Univ. of Mexico (1950–55), then jo...

airfoil

(Encyclopedia)airfoil, surface designed to develop a desired force by reaction with a fluid, especially air, that is flowing across the surface. For example, the fixed wing surfaces of an airplane produce lift, whi...

United States Air Force Academy

(Encyclopedia)United States Air Force Academy, at Colorado Springs, Colo.; for training young men and women to be officers in the U.S. air force; authorized in 1954 by Congress. Temporary quarters were opened at th...