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Tasmania

(Encyclopedia)Tasmania tăzmāˈnēə [key], island state (2016 pop. 509,965), 26,383 sq mi (68,332 sq km), SE Commonwealth of Australia. It is separated from Australia by the Bass Strait and lies 150 mi (240 km) s...

Moorish art and architecture

(Encyclopedia)Moorish art and architecture, branch of Islamic art and architecture developed in the westernmost lands of the Muslims, known as the Maghreb: N Africa and Spain. The Great Mosque at Al Qayrawan in Tun...

superconductivity

(Encyclopedia)superconductivity, abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Heike Kamerlingh Onnes, who found that the resistance of mercury dropped sudd...

Williams, Tennessee

(Encyclopedia)Williams, Tennessee (Thomas Lanier Williams), 1911–83, American dramatist, b. Columbus, Miss., grad. State Univ. of Iowa, 1938. One of America's foremost 20th-century playwrights and the author of m...

Sakha Republic

(Encyclopedia)Sakha Republic yəko͞oˈshēə [key], constituent republic (1995 pop. 1,035,000), c.1,200,000 sq mi (3,108,000 sq km), NE Siberian Russia. Yakutsk is the capital. The Sakha Republic is bounded in the...

Shan State

(Encyclopedia)Shan State shän [key], state (1983 pop. 3,718,706), c.60,000 sq mi (155,400 sq km), E central Myanmar. Taunggyi, the capital, and Lashio are its principal cities. It borders on China in the north, La...

semiconductor

(Encyclopedia)CE5 N-type and P-type crystals: In a pure silicon crystal each silicon atom (Si) is surrounded by four valence electrons. In the N-doped semiconductor, illustrated in the left-hand figure, some sil...

manganese

(Encyclopedia)manganese măngˈgənēs, mănˈ– [key] [Lat.,=magnet], metallic chemical element; symbol Mn; at. no. 25; at. wt. 54.93805; m.p. about 1,244℃; b.p. about 1,962℃; sp. gr. 7.2 to 7.45, depending o...

roof

(Encyclopedia)roof, overhead covering of a building with its framework support. Various methods of construction, such as are suited to different climates, have diversified exterior and interior architectural effect...

dentistry

(Encyclopedia)dentistry, treatment and care of the teeth and associated oral structures. Dentistry is mainly concerned with tooth decay, disease of the supporting structures, such as the gums, and faulty positionin...