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delta
delta [from triangular shape of the Nile delta, like the Greek letter delta ], a deposit of clay, silt, and sand formed at the mouth of a river where the stream loses velocity and drops part of its sediment load. No delta is formed if the coast is sinking or if there is an ocean or tidal current s...
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Pithom
Pithom , in the Bible, the ancient treasure city of Egypt, in the eastern part of the Nile delta, built by the Israelites for the pharaoh. Ruins include walls of storage chambers.
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Mississippi
Mississippi river, principal river of the United States, c.2,350 mi (3,780 km) long, exceeded in length only by the Missouri River, the chief of its numerous tributaries. The combined Missouri-Mississippi system (from the Missouri's headwaters in the Rocky Mts. to the mouth of the Mississippi River...
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Guangdong
Guangdong or Kwangtung , province (1994 est. pop. 66,910,000), c.76,000 sq mi (196,891 sq km), S China. The capital is Guangzhou . On coastal islands and adjacent mainland territories are Hong Kong and Macao . The island of Hainan , once part of Guangdong, became a separate province in 1988...
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free energy
free energy or Gibbs free energy, quantity derived from the relationships between heat and work studied in thermodynamics and used as a measure of the relative stability of a physical or chemical system, i.e., the tendency of the system to react or change. If the change in free energy, &Delta...
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Antioch
Antioch city (1990 pop. 62,195), Contra Costa co., W Calif., on the San Joaquin River near the mouth of the Sacramento; inc. 1872. It is a processing and shipping center for the agricultural products of the delta area between the rivers. There is also varied manufacturing.
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D
D fourth letter of the alphabet . It corresponds to the Greek delta. It is a usual symbol for a voiced dental or, as in English, alveolar stop. The capital represents in musical notation a note in the scale and in Roman numerals the number 500.
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Mareotis
Mareotis or Maryut , salt lake, c.95 sq mi (250 sq km) excluding marshes, N Egypt, in the Nile delta. It is separated from the Mediterranean Sea by the narrow isthmus on which Alexandria is situated. There are fisheries and saltworks on the lakeshore.
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Neva
Neva , river, 46 mi (74 km) long, NW European Russia, connecting Lake Ladoga with the Gulf of Finland, an inlet of the Baltic Sea. St. Petersburg is situated in its delta. The Neva is connected by canal systems with the Volga River and with the White Sea.
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Red River
Red River Chinese Yuan Chiang, Vietnamese Song Hong, chief river of N Vietnam, 730 mi (1,175 km) long, rising in Yunnan prov., S China, and flowing southeast, in deep, narrow gorges, through N Vietnam to form a great delta before entering the Gulf of Tonkin. The river carries a large quantity o...
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