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Trachonitis

(Encyclopedia)Trachonitis trăkˌənīˈtĭs [key], region, ancient Palestine, NE of the Sea of Galilee and SE of Damascus. It formed part of the tetrarchy of Herod Philip and Herod Agrippa I. It is mentioned in th...

Veterans' Day

(Encyclopedia)Veterans' Day, holiday formerly observed in the United States as Armistice Day in commemoration of the signing of the Armistice ending World War I. Nov. 11 officially became Veterans' Day on May 24, 1...

Du Pont, Pierre Samuel

(Encyclopedia)Du Pont, Pierre Samuel, 1870–1954, American industrialist, b. Wilmington, Del., grad. Massachusetts Institute of Technology, 1890. Du Pont worked as a chemist with the family's company, helping to d...

Cherenkov radiation

(Encyclopedia)Cherenkov radiation or Cerenkov radiation [for P. A. Cherenkov], light emitted by a transparent medium when charged particles pass through it at a speed greater than the speed of light in the medium. ...

Yaroslav

(Encyclopedia)Yaroslav (Yaroslav the Wise) yərəslävˈ [key], 978–1054, grand duke of Kiev (1019–54); son of Vladimir I. Designated by his father to rule in Novgorod, he became grand duke of Kiev after defeat...

St. John, Oliver

(Encyclopedia)St. John, Oliver sĭnˈjən [key], 1598?–1673, English politician. He married (1638) a cousin of Oliver Cromwell. In 1637–38 he was, by his brilliant defense of John Hampden in the ship money case...

Hellenistic civilization

(Encyclopedia)Hellenistic civilization. The conquests of Alexander the Great spread Hellenism immediately over the Middle East and far into Asia. After his death in 323 b.c., the influence of Greek civilization con...

schizophrenia

(Encyclopedia)schizophrenia skĭtˌsəfrēˈnēə [key], group of severe mental disorders characterized by reality distortions resulting in unusual thought patterns and behaviors. Because there is often little or n...

Helena, Saint

(Encyclopedia)Helena, Saint hĕlˈənə [key], c.248–328?, mother of Constantine I. She became a Christian in 313. According to tradition she found (327) the relic of the True Cross in Jerusalem and identified th...

Hoffmann, Max

(Encyclopedia)Hoffmann, Max, 1869–1927, German general in World War I. A brilliant strategist, he contributed to the German victory over the Russians at Tannenberg and in 1916 became chief of staff of the eastern...