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Senkaku Islands

(Encyclopedia)Senkaku Islands sĕnˈkäko͞o [key], small, uninhabited island group, 8 sq mi (20.7 sq km), Okinawa prefecture, extreme SW Japan, in the East China Sea. Located 90 mi (45 km) NNW of Ishigaki in the R...

Indian Ocean

(Encyclopedia)Indian Ocean, third largest ocean, c.28,350,000 sq mi (73,427,000 sq km), extending from S Asia to Antarctica and from E Africa to SE Australia; it is c.4,000 mi (6,400 km) wide at the equator. It con...

sonar

(Encyclopedia)sonar sōˈnär [key], device used underwater for locating submerged objects and for submarine communication by means of sound waves. The term sonar is an acronym for sound navigation ranging. The mai...

Mackay, John William

(Encyclopedia)Mackay, John William măkˈē [key], 1831–1902, American financier, b. Dublin, Ireland. He immigrated to the United States in 1840. In 1859 he joined the rush to Nevada, where silver had been discov...

tsunami

(Encyclopedia)tsunami tso͝onäˈmē [key], series of catastrophic ocean waves generated by submarine movements, which may be caused by earthquakes, volcanic eruptions, landslides beneath the ocean, or an asteroid ...

Arctic Ocean

(Encyclopedia)Arctic Ocean, the smallest ocean, c.5,400,000 sq mi (13,986,000 sq km), located entirely within the Arctic Circle and occupying the region around the North Pole. The Arctic basin was almost wholly u...

Scapa Flow

(Encyclopedia)Scapa Flow skăpˈə [key], area of water, 15 mi (24 km) long and 8 mi (12.9 km) wide, in the Orkney Islands, off N Scotland. It is bounded by the islands of Mainland, Graemsay, Burray, South Ronaldsa...

Bernstorff, Johann Heinrich, Graf von

(Encyclopedia)Bernstorff, Johann Heinrich, Graf von bĕrnsˈtôrf [key], 1862–1939, German diplomat. As ambassador to the United States (1908–17), he tried to conciliate American feelings toward Germany and re...

Theremin, Leon

(Encyclopedia)Theremin, Leon thĕrˈəmən [key], 1896–1993, Russian engineer and inventor, b. St. Petersburg as Lev Sergeyevich Termen. He studied and worked in his native city, attending its university and cons...

cable

(Encyclopedia)cable, originally wire cordage of great strength or heavy metal chain used for hauling, towing, supporting the roadway of a suspension bridge, or securing a large ship to its anchor or mooring. Today ...