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astrobleme

(Encyclopedia)astrobleme ăsˈtrōblēmˌ [key], large, circular structure ranging from c.1⁄2 mi to 40 mi (.8–64 km) in diameter. Astroblemes are found at numerous places on the earth's surface, e.g., Meteor, o...

Kekulé von Stradonitz, Friedrich August

(Encyclopedia)Kekulé von Stradonitz, Friedrich August frēˈdrĭkh ouˈgo͝ost kāˈko͞olā fən shträˈdōnĭts [key], 1829–96, German organic chemist. He was professor at Ghent (1858–65) and at Bonn from 1...

Swains Island

(Encyclopedia)Swains Island, island, 1 sq mi (2.59 sq km), district of American Samoa, c.200 mi (320 km) N of Tutuila. It is a ring of sand and coral with luxuriant vegetation. Swains Island has been privately owne...

Louis, Joe

(Encyclopedia)Louis, Joe (Joseph Louis Barrow) lo͞oˈĭs [key], 1914–81, American boxer, b. Lafayette, Ala. His father, a sharecropper, died when Louis was four years old, and in 1926 his stepfather took the fam...

vortex

(Encyclopedia)vortex vôrˈtĕks [key], mass of fluid in whirling or rotary motion. To simplify the analysis, vortex motion usually describes motions in a frictionless fluid. In such cases the absence of friction w...

circus

(Encyclopedia)circus [Lat.,=ring, circle], historically, the arena associated with the horse and chariot races and athletic contests known in ancient Rome as the Circensian games. The Roman circus was a round or ov...

Bordone, Paris

(Encyclopedia)Bordone, Paris päˈrēs bōrdôˈnā [key], 1500–1571, Venetian painter of the Renaissance; pupil of Titian. Skillful in his use of color, he was particularly interested in variations of texture in...

Spalding, Gilbert R.

(Encyclopedia)Spalding, Gilbert R., 1811?–1880, American showman, b. Albany co., N.Y. Known as “Doc” because he owned a drug and paint store in the early 1840s, he acquired a circus in the mid-1840s and in 18...

Worms, Concordat of

(Encyclopedia)Worms, Concordat of, 1122, agreement reached by Pope Calixtus II and Holy Roman Emperor Henry V to put an end to the struggle over investiture. By its terms the emperor guaranteed free election of bis...

Nibelungen

(Encyclopedia)Nibelungen –lētˌ [key] [song of the Nibelungen] is a long Middle High German epic by a south German poet of the early 13th cent. It includes pagan legends and traditions but is patently the produc...