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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…nuclear winter
(Encyclopedia) nuclear winter, theory holding that the smoke and dust produced by a large nuclear war would result in a prolonged period of cold on the earth. The earliest version of the theory,…aviation medicine
(Encyclopedia) aviation medicine, scientific study of the biological effects of aviation, especially on human beings. Although aviation medicine is concerned with such problems as the spread of…esophagus
(Encyclopedia) esophagusesophagusĭsŏfˈəgəs [key], portion of the digestive tube that conducts food from the mouth to the stomach. When food is swallowed it passes from the pharynx into the esophagus…Ford, Paul Leicester
(Encyclopedia) Ford, Paul LeicesterFord, Paul Leicesterlĕsˈtər [key], 1865–1902, American historian and novelist, b. Brooklyn, N.Y. His father, Gordon L. Ford, then possessed probably the best…Groote Schuur
(Encyclopedia) Groote SchuurGroote Schuurkhr&oobreve;ˈtə skür [key] [Afrik.,=large barn], estate, Cape Town, Western Cape, SW South Africa. The main building of the estate, which is a good…time and motion study
(Encyclopedia) time and motion study, analysis of the operations required to produce a manufactured article in a factory, with the aim of increasing efficiency. Each operation is studied minutely and…Wallas, Graham
(Encyclopedia) Wallas, GrahamWallas, Grahamwŏlˈəs [key], 1858–1932, English political scientist and psychologist. He joined (1886) the Fabian Society and was the author of one of the Fabian Essays.…Bridges, Robert Seymour
(Encyclopedia) Bridges, Robert Seymour, 1844–1930, English poet. In 1882 he abandoned medical practice to devote himself to writing. An excellent metrist, he wrote many beautiful lyrics and longer…Wergeland, Henrik
(Encyclopedia) Wergeland, HenrikWergeland, Henrikhĕnˈrĭk vĕrˈgəlän [key], 1808–45, Norwegian writer and patriot. A champion of liberty, democracy, and international cooperation, he worked zealously…Trending
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