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Leixões

(Encyclopedia)Leixões lāˈshoiNsh [key], artificial seaport of Oporto, NW Portugal. Built in the late 19th cent, its chief export is port wine. ...

acrylic

(Encyclopedia)acrylic, artificial fiber made from a special group of vinyl compounds, primarily acrylonitrile. Acrylic fibers are thermoplastic (i.e., soften when heated, reharden upon cooling), have low moisture r...

Ozarks, Lake of the

(Encyclopedia)Ozarks, Lake of the, artificial lake, 93 sq mi (241 sq km), c.130 mi (210 km) long, central Mo., largest reservoir in the state; created by the impounding of the Osage River by Bagnell Dam. Its irregu...

Barnard, Edward Emerson

(Encyclopedia)Barnard, Edward Emerson, 1857–1923, American astronomer, b. Nashville, Tenn., grad. Vanderbilt Univ., 1887. From 1887 to 1895 he was astronomer at Lick Observatory in California, and from 1895 he wa...

Pierce, John

(Encyclopedia)Pierce, John, 1910–2002, American electrical engineer, b. Des Moines, Iowa, grad. California Institute of Technology (Ph.D. 1936). Pierce worked at the Bell Telephone Laboratories, where he proposed...

X-ray astronomy

(Encyclopedia)X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that the sun emits X ...

Kamensk-Shakhtinski

(Encyclopedia)Kamensk-Shakhtinski käˈmyĭnsk-shäkhˈtyĭnskē [key], city (1989 pop. 72,000), SE European Russia, on the Donets River. A mining center of the Donets coal basin, the city is also an important prod...

Timaru

(Encyclopedia)Timaru tĭmˈəro͞o [key], city (1996 pop. 27,323), E central South Island, New Zealand, on the Pacific Ocean. It is the main port for the S Canterbury Plains. Frozen meats and other products are exp...

Russellville

(Encyclopedia)Russellville, city (1990 pop. 21,260), seat of Pope co., central Ark., in an area yielding coal, timber, and diverse agricultural products; settled 1835, inc. 1870. Transportation equipment is manufac...

SOS

(Encyclopedia)SOS, code letters of the international distress signal. The signal is expressed in International Morse code as … — — — ……———… (three dots, three dashes, three dots). This c...