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sponge

(Encyclopedia)sponge, common name for members of the aquatic animal phylum Porifera, and for the dried, processed skeletons of certain species used to hold water. Over 4,500 living species are known; they are found...

Nemrut, Mount

(Encyclopedia)Nemrut, Mount, Turk. Nemrut Dağ, mountain in SE Turkey, in the Anti-Taurus Mts. Rising 7,052 ft (2,150 m), it is the site of the mausoleum of Antiochus I (c.69–c.34 b.c.), king of ancient Commagene...

Livorno

(Encyclopedia)Livorno lē vôrˈnô [key], Brit. Leghorn, city (1991 pop. 167,512), capital of Livorno prov., Tuscany, central Italy, on the Ligurian Sea and on the Aurelian Way. It is a busy commercial, industrial...

Ryazan

(Encyclopedia)Ryazan ryəzänˈyə [key], city (1989 pop. 515,000), capital of Ryazan region, E central European Russia, on the Oka River. Industries include oil refining, lignite processing, and the manufacture of...

court tennis

(Encyclopedia)court tennis, indoor racket and net game of ancient origin. It is believed to have originated (about the 14th cent.) in medieval France and is the forerunner of most modern racket games. In its early ...

Crookes tube

(Encyclopedia)Crookes tube, device invented by Sir William Crookes (c.1875) consisting essentially of a sealed glass tube from which nearly all the air has been removed and through the walls of which are passed two...

Coanda effect

(Encyclopedia)Coanda effect or wall-attachment effect, the tendency of a moving fluid, either liquid or gas, to attach itself to a surface and flow along it. As a fluid moves across a surface a certain amount of fr...

cyclosis

(Encyclopedia)cyclosis sīklōˈsĭs [key], streaming of cytoplasm within a living cell without deformation of the external cell membrane. In some plant cells there is a rapid rotatory cytoplasmic movement, which i...

Trujillo , city, Peru

(Encyclopedia)Trujillo tro͞ohēˈyō [key], city (1993 pop. 256,744), capital of La Libertad dept., NW Peru, in a fertile oasis of the coastal desert. A thriving commercial and industrial center, Trujillo processe...

Antiope

(Encyclopedia)Antiope ăntīˈəpē [key], in Greek mythology. 1 Theban princess, daughter of Nycteus. She was seduced by Zeus and bore him twin sons, Zethus and Amphion. Fleeing to Sicyon to escape the wrath of he...