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uncertainty principle

(Encyclopedia)uncertainty principle, physical principle, enunciated by Werner Heisenberg in 1927, that places an absolute, theoretical limit on the combined accuracy of certain pairs of simultaneous, related measur...

Xenophon

(Encyclopedia)Xenophon zĕnˈəfən [key], c.430 b.c.–c.355 b.c., Greek historian, b. Athens. He was one of the well-to-do young disciples of Socrates before leaving Athens to join the Greek force (the Ten Thousa...

Berg, Alban

(Encyclopedia)Berg, Alban älˈbän bĕrk [key], 1885–1935, Austrian composer. In his youth he taught himself music but in 1904 he became the pupil and close friend of Arnold Schoenberg. Later Berg himself taught...

cannibalism

(Encyclopedia)cannibalism kănˈĭbəlĭzəm [key] [Span. caníbal, referring to the Carib], eating of human flesh by other humans. The charge of cannibalism is a common insult, and it is likely that some alleged c...

Caravaggio, Michelangelo Merisi da

(Encyclopedia)Caravaggio, Michelangelo Merisi da äˌmārēˈjē [key], 1571–1610, Italian painter. His surname, Caravaggio, came from his birthplace. After an apprenticeship in Milan, he arrived (1592) in Rome w...

Roberts, John Glover, Jr.

(Encyclopedia)Roberts, John Glover, Jr., 1955–, American public official, 17th chief justice of the U.S. Supreme Court (2005–), b. Buffalo, N.Y., grad. Harvard (B.A. 1976, J.D. 1979). He clerked (1980–81) for...

Tieck, Ludwig

(Encyclopedia)Tieck, Ludwig lo͝otˈvĭtkh tēk [key], 1773–1853, German writer. In his youth he led the transition from Sturm und Drang to romanticism, writing with W. H. Wackenroder Phantasien über die Kunst (...

Simmel, Georg

(Encyclopedia)Simmel, Georg gāˈôrk zĭmˈəl [key], 1858–1918, German philosopher and sociologist. At the universities of Berlin and Strasbourg he was an influential lecturer. Basing his social philosophy on a...

Joel, book of the Bible

(Encyclopedia)Joel, prophetic book of the Bible. It is a collection of the oracles of an otherwise unknown prophet, dated variously from the 9th to the 3d cent. b.c., though a date in c.400 b.c. is likely. A locust...

Kluckhohn, Clyde Kay Maben

(Encyclopedia)Kluckhohn, Clyde Kay Maben klŭckˈhōn [key], 1905–60, American anthropologist, b. LeMars, Iowa, grad. Univ. of Wisconsin, 1928, M.A. Oxford, 1932, Ph.D. Harvard, 1936. He taught at the Univ. of Ne...