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picric acid
(Encyclopedia) picric acidpicric acidpĭkˈrĭk [key] or 2,4,6-trinitrophenol2,4,6-trinitrophenoltrīˌnīˌtrōfēˈnōl [key], C6H2(NO2)3OH, a toxic yellow crystalline solid that melts at 122℃ and is soluble…Astaire, Fred
(Encyclopedia) Astaire, FredAstaire, Fredəstârˈ [key], 1899–1987, American dancer, actor, and singer, b. Omaha, Nebr., as Frederick Austerlitz. After 1911 he and his sister Adele (1896–1981), b.…Bulfinch, Charles
(Encyclopedia) Bulfinch, Charles, 1763–1844, American architect, b. Boston. A member of the Boston board of selectmen in 1791, he was chosen chairman in 1799—an office equivalent to mayor and held by…Balla, Giacomo
(Encyclopedia) Balla, Giacomo, 1871–1958, Italian painter, one of the founders of futurism. He moved from Turin to Rome in his twenties and began painting in a realist style. He travelled (1900) to…combinatorics
(Encyclopedia) combinatoricscombinatoricskŏmˌbənətôrˈĭks [key] or combinatorial analysiscombinatoricskŏmˌbĭnətôrˈēəl [key], sometimes called the science of counting, the branch of mathematics…Hitchcock, Sir Alfred
(Encyclopedia) Hitchcock, Sir Alfred, 1899–1980, English-American film director, writer, and producer, b. London. Hitchcock began his career as a director in 1925 and became prominent with The 39…direct action
(Encyclopedia) direct action, theory and methods used by certain labor groups to fight employers, capitalist institutions, and the state by direct economic action, without using intermediate…Varanasi
(Encyclopedia) VaranasiVaranasivəränˈəsē [key], formerly BenaresVaranasibənäˈrĭz [key], city (1991 pop. 1,030,863), Uttar Pradesh state, N central India, on the Ganges River. Although a rail hub and…polarography
(Encyclopedia) polarographypolarographypōˌlərŏgˈrəfē [key], in chemistry, method for analyzing the composition of a dilute electrolytic solution (see electrolyte). Two electrodes are placed in the…programmed instruction
(Encyclopedia) programmed instruction, method of presenting new subject matter to students in a graded sequence of controlled steps. Students work through the programmed material by themselves at…Trending
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