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Pennines

(Encyclopedia)Pennines pĕnˈīnz [key] or Pennine Chain, mountain range, sometimes called the “backbone of England,” extending c.160 mi (260 km) from the Cheviot Hills on the Scottish border to the Peak Distri...

polybrominated biphenyl

(Encyclopedia)polybrominated biphenyl or PBB, any of a group of organic compounds used as a fire retardant. In 1973 several thousand pounds of PBB were accidentally mixed with livestock feed that was later distribu...

Tulun

(Encyclopedia)Tulun tŭlo͞onˈ [key] inhabited atoll, Papua New Guinea, SW Pacific, in the N Solomons Islands chain 45 mi (72 km) NE of Buka. Also known as the Carteret Islands, Carteret Atoll, and Kilinailau, the...

Puyehue–Cordón Caulle

(Encyclopedia)Puyehue–Cordón Caulle, volcanic complex, SE Chile, in the Andes Mts. within Puyehue National Park. The volcanic chain comprises (NW to SE) the Cordillera Nevada caldera (5,902 ft/1,799 m high), the...

histidine

(Encyclopedia)CE5 histidine hĭsˈtĭdēn [key], organic compound, one of the 22 α-amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein. Histidine is the direct pr...

Bernhard of Saxe-Weimar

(Encyclopedia)Bernhard of Saxe-Weimar săksˈ–wīˈmär, zäksˈə-vīˈmär [key], 1604–39, Protestant general in the Thirty Years War, duke of Weimar. Under Ernst von Mansfeld and the margrave of Baden, Bernh...

laburnum

(Encyclopedia)laburnum ləbûrˈnəm [key] or golden chain, small tree (Laburnum anagyroides) of the family Leguminosae (pulse family) with decorative dark green leaves and sprays of bright yellow flowers. It is na...

Kresge Foundation

(Encyclopedia)Kresge Foundation krĕsˈkē [key], fund established (1924) by retail chain store owner Sebastian S. Kresge (1867–1966) as a broad-purpose philanthropic institution. The foundation describes its pol...

Hahn, Otto

(Encyclopedia)Hahn, Otto ôˈtō hän [key], 1879–1968, German chemist and physicist. His important contributions in the field of radioactivity include the discovery of several radioactive substances, the develop...

Florida Keys

(Encyclopedia)Florida Keys, chain of coral and limestone islands and reefs, c.150 mi (240 km) long, extending from Virginia Key, S of Miami Beach, to Key West, and forming the southern extremity of Florida. Between...