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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...

West, Benjamin

(Encyclopedia)West, Benjamin, 1738–1820, American historical painter who worked in England. He was born in Springfield, Pa., in a house that is now a memorial museum at Swarthmore College. After some instruction ...

transposing instrument

(Encyclopedia)transposing instrument, a musical instrument whose part in a score is written at a different pitch than that actually sounded. Such an instrument is usually referred to by the keynote of its natural s...

tomato

(Encyclopedia)tomato, plant (Lycopersicon esculentum) of the family Solanaceae (nightshade family), related to the potato and eggplant. Although cultivated in Mexico and Peru for centuries before the European conqu...

Witte, Count Sergei Yulyevich

(Encyclopedia)Witte, Count Sergei Yulyevich syĭrgāˈ yo͞oˈlyĭvĭch vĭtˈə [key], 1849–1915, Russian premier. A railway administrator, he became minister of communications (1892) and minister of finance (18...

zero

(Encyclopedia)zero, that number which, when added to any number, leaves the latter unchanged; its symbol is 0. The introduction of zero into the decimal system was the most significant achievement in the developmen...

Satanism

(Encyclopedia)Satanism. The cult of Satan, or Satan worship, is in part a survival of the ancient worship of demons and in part a revolt against Christianity or the church. It rose about the 12th cent. in Europe an...

Stella, Frank

(Encyclopedia)Stella, Frank, 1936–, American artist, b. Malden, Mass. In his early “black paintings” Stella exhibits the precision and rationality that characterized minimalism, employing parallel angular str...

Japanese music

(Encyclopedia)Japanese music, the highly eclectic musical culture of the Japanese islands. Over the years, Japan has borrowed musical instruments, scales, and styles from many neighboring areas. The indigenous musi...

Leonardo da Vinci

(Encyclopedia)Leonardo da Vinci də vĭnˈchē, Ital. lāōnärˈdō dä vēnˈchē [key], 1452–1519, Italian painter, sculptor, architect, musician, engineer, and scientist, b. near Vinci, a hill village in Tusc...