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amateur

(Encyclopedia)amateur, in sports, one who engages in athletic competition without material recompense. Upper-class Englishmen in the 19th cent. used the concept to help define their social status, first applying th...

Alexis, czar of Russia

(Encyclopedia)Alexis əlyĭksyāˈ mēkhīˈləvĭch [key], 1629–76, czar of Russia (1645–76), son and successor of Michael. His reign, marked by numerous popular outbreaks, was crucial for the later developmen...

radio range

(Encyclopedia)radio range, geographically fixed radio transmitter that radiates coded signals in all directions to enable aircraft and ships to determine their bearings. An aircraft or ship can determine its line o...

Jenghiz Khan

(Encyclopedia)CE5 Empire of Jenghiz Khan (1227) Jenghiz Khan jĕngˈgĭs, gĕngˈgĭs kän [key], Mongolian Chinggis Khaan, 1167?–1227, Mongol conqueror, originally named Temujin. He succeeded his father, Yek...

Basil I

(Encyclopedia)Basil I (Basil the Macedonian) băzˈəl, bāˈzəl [key], c.813–886, Byzantine emperor (867–86). His ancestors probably were Armenians or Slavs who settled in Macedonia. He became (c.856) the fav...

information theory

(Encyclopedia)information theory or communication theory, mathematical theory formulated principally by the American scientist Claude E. Shannon to explain aspects and problems of information and communication. Whi...

Roman law

(Encyclopedia)Roman law, the legal system of Rome from the supposed founding of the city in 753 b.c. to the fall of the Byzantine Empire in a.d. 1453; it was later adopted as the basis of modern civil law. Most aut...

protocol

(Encyclopedia)protocol prōˈtəkŏl [key], term referring to rules governing diplomatic conduct or to a variety of written instruments. Examples of the latter are authenticated minutes of international conferences...

Herat

(Encyclopedia)Herat hĕrätˈ [key], city (1984 est. pop. 161,000), capital of Herat prov., NW Afghanistan, on the Hari Rud. The fertile river valley is renowned for its fruits, especially grapes. Herat has textile...

Pledge of Allegiance

(Encyclopedia)Pledge of Allegiance, in full, Pledge of Allegiance to the Flag of the United States of America, oath that proclaims loyalty to the United States. and its national symbol. It reads: “I pledge allegi...