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hovercraft
hovercraft, also known as a ground effect machine and air cushion vehicle. It supports its own weight by generating and containing an air cushion beneath its hull. The air cushion, usually generated by fans, is created by blowing air beneath the hull. This air hits the surface the vehicle is travel...
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Nelson
Nelson city (1991 pop. 8,760), SE British Columbia, on the Kootenay River. It is a transportation and administrative center for a lumbering and farming region.
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swim bladder
swim bladder large, thin-walled sac in some fishes that may function in several ways, e.g., as a buoyant float, a sound producer and receptor, and a respiratory organ. The swim bladder, or air bladder, is located in the dorsal portion of the body cavity and is filled with gases. When gas is added t...
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STP
STP or standard temperature and pressure, standard conditions for measurement of the properties of matter. The standard temperature is the freezing point of pure water, 0°C or 273.15°K. The standard pressure is the pressure exerted by a column of mercury (symbol Hg) 760 mm high, often d...
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Florence May Chadwick
Florence May Chadwick 1918-95, American distance swimmer, b. San Diego, Calif. She began swimming at the age of six, and four years later she swam the San Diego Bay Channel, the first child to do so. On Aug. 8, 1950, she broke Gertrude Ederle 's 24-year record for English Channel swims by women. F...
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Silchester
Silchester , village, Hampshire, S England. It is noted for the ruins of the Roman-British town Calleva Atrebatum. The outside walls (2,760 yd/2,524 m in circumference), forum, amphitheater, and entire plan of the city, including baths and several temples, were revealed through excavations beginning...
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Saint Francis
Saint Francis river, c.470 mi (760 km) long, rising in the hills of SE Missouri and flowing S through NE Arkansas to join the Mississippi River near Helena, Ark. The river forms part of the Arkansas-Missouri border. Wappapello Dam (completed 1941), near Poplar Bluff, Mo., forms a reservoir. The riv...
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Saint-Tropez
Saint-Tropez , town (1993 est. pop. 5,760), Var dept., SE France, on the French Riviera . It is a fashionable beach resort and a picturesque small fishing port, made famous by film personalities during the 1960s. From the 15th to the 17th cent. it was an independent republic.
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Tyrrhenian Sea
Tyrrhenian Sea , Ital. Tirreno, part of the Mediterranean Sea, c.475 mi (760 km) long and from 60 to 300 mi (97-483 km) wide, between the Ligurian Sea, the Italian peninsula, Sicily, Sardinia, and Corsica. The Strait of Messina connects it with the Ionian Sea. The sea is named for the Tyrrhenoi (a...
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swimming
swimming self-propulsion through water, often as a form of recreation or exercise or as a competitive sport. It is mentioned in many of the classics in connection with heroic acts or religious rites. The first book on methods of swimming was Nicolas Wynman's Dialogue Concerning the Art of Swimming...
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