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William Dawes
William Dawes 1745-99, figure in the American Revolution, b. Boston, Mass. On the night of Apr. 18, 1775, Dawes rode from Boston, via Brighton Bridge, to Lexington, warning the countryside of the British advance. At Lexington, he was joined by Paul Revere and Samuel Prescott . On the way to Conc...
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osteomyelitis
osteomyelitis , infection of the bone and bone marrow. Direct infection of bone usually occurs through open fractures, penetrating wounds, or surgical operations. Infecting microorganisms may also reach the bone via the bloodstream, the most common means of bone infection in children. Osteomyelitis ...
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reconnaissance satellite
reconnaissance satellite artificial satellite launched by a country to provide intelligence information on the military activities of foreign countries. There are four major types. Early-warning satellites detect enemy missile launchings. Nuclear-explosion detection satellites are designed to...
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Lake Chelan
Lake Chelan , 55 mi (89 km) long and from 1 to 2 mi (1.6-3.2 km) wide, located in a deep narrow gorge in the Cascade Range, NW Wash.; third-deepest freshwater lake in the United States. Fed by streams from the Cascade Range, the lake flows into the Columbia River via the Chelan River. Lake Chelan Da...
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Legionnaire's disease
Legionnaire's disease , infectious, sometimes fatal, disease characterized by high fever, dry cough, lung congestion, and subsequent pneumonia . Major organs, such as the heart, may be damaged as the disease progresses. The disease struck over 180 people attending an American Legion convention in P...
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Prince George
Prince George city (1991 pop. 69,653), central British Columbia, Canada, at the confluence of the Fraser and Nechako rivers. It is a railroad division point and a distribution center for a lumber region. There are sawmills, pulp mills, chemical plants, and an oil refinery. In 1807, Simon Fraser of ...
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Vlissingen
Vlissingen or Flushing , city (1994 pop. 44,211), Zeeland prov., SW Netherlands, on the southern coast of the former island of Walcheren . Its manufactures include shipbuilding, chemicals, and gears. Dairying, cattle, sugar beets, vegetables, grain, and fishing are also important. The city has ...
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waltz
waltz romantic dance in moderate triple time. It evolved from the German Ländler and became popular in the 18th cent. The dance is smooth, graceful, and vital in performance. The waltz in Vicente Martin's opera Una cosa rara, produced in Vienna (1776), is regarded as the first Viennese wal...
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electronic mail
electronic mail or e-mail, the electronic transmission of messages, letters, and documents. In its broadest sense electronic mail includes point-to-point services such as telegraph and facsimile (fax) systems. It is commonly thought of, however, in terms of computer-based message systems wh...
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Appian Way
Appian Way , Lat. Via Appia, most famous of the Roman roads , built (312 BC) under Appius Claudius Caecus. It connected Rome with Capua and was later extended to Beneventum (now Benevento), Tarentum (Taranto), and Brundisium (Brindisi). It was the chief highway to Greece and the East. Its total l...
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