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probability

(Encyclopedia)probability, in mathematics, assignment of a number as a measure of the “chance” that a given event will occur. There are certain important restrictions on such a probability measure. In any exper...

Nobile, Umberto

(Encyclopedia)Nobile, Umberto o͞ombĕrˈtō nōˈbēlā [key], 1885–1978, Italian aeronautical engineer and arctic explorer. He designed the dirigible Norge and piloted it in the Amundsen-Ellsworth flight over t...

Leopold II, king of the Belgians

(Encyclopedia)Leopold II, 1835–1909, king of the Belgians (1865–1909), son and successor of Leopold I. His reign saw great industrial and colonial expansion. In 1876 he organized, with the help of H. M. Stanley...

Churchill, rivers, Canada

(Encyclopedia)Churchill. 1 River, c.600 mi (970 km) long, issuing as the Ashuanipi River from Ashuanipi Lake, SW Labrador, N.L., Canada, and flowing in an arc north, then southeast through a series of lakes to Chur...

Durango, state, Mexico

(Encyclopedia)Durango do͞orängˈgō [key], state, 47,691 sq mi (123,520 sq km), N central Mexico. The city of ...

Catlin, George

(Encyclopedia)Catlin, George, 1796–1872, American traveler and artist, b. Wilkes-Barre, Pa. Educated as a lawyer, he practiced in Philadelphia for two years but turned to art study and became a portrait painter i...

avionics

(Encyclopedia)avionics āˌvēŏnˈĭks [key], electronic instruments used in air or space flight; also the design and production of such instruments. Early planes had few instruments, but as aviation and aircraft ...

lettre de cachet

(Encyclopedia)lettre de cachet lĕˈtrə də käshāˈ [key], formerly in French law, private, sealed document, issued as a communication from the king. Such a letter could order imprisonment or exile for an indivi...

rancheria

(Encyclopedia)rancheria ränchāˈrēä [key], type of communal settlement formerly characteristic of the Yaqui Indians of Sonora, Mexico, and of various small Native American groups of the SW United States, especi...

Pavilion Lake

(Encyclopedia)Pavilion Lake, lake, 3.6 mi (5.8 km) long, 2,625 ft (800 m) wide, and 213 ft (65 m) deep at its maximum depth, in Marble Canyon at the S end of the Marble Range near Cache Creek, S British Columbia, C...