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Mari El, constituent republic, Russia

(Encyclopedia)Mari El mäˈrē ĕlˈ [key], constituent republic (1990 pop. 760,000), c.8,900 sq mi (23,100 sq km), E central European Russia, in the middle Volga valley. Yoshkar-Ola is the capital. The region is a...

Ben Ali, Zine el-Abidine

(Encyclopedia)Ben Ali, Zine el-Abidine zēˈnĕl abĭdēn bĕn älēˈ [key], 1936–2019, president of Tunisia (1987–2011). Educated in France and the United States, he entered the army and became ambassador to ...

San Salvador, city, El Salvador

(Encyclopedia)San Salvador sän sälväᵺōrˈ [key], city (1993 pop. 402,448), central El Salvador, capital and largest city of the country. It is the center of El Salvador's trade and communications. Beer, tobac...

Santa Ana, city, El Salvador

(Encyclopedia)Santa Ana sänˌtä äˈnä [key], city (1993 pop. 129,873), W El Salvador. It is the second largest city in the country and the commercial and processing center for a sugarcane, coffee, and cattle re...

Kajita, Takaaki

(Encyclopedia)Kajita, Takaaki 1959–, Japanese physicist, Ph.D. Univ. of Tokyo, 1986. In 1988 he joined the faculty at the Univ. of Tokyo, where he is now professor and director of the Institute for Cosmic Ray Res...

metronome

(Encyclopedia)metronome mĕˈtrənōmˌ [key], in music, originally pyramid-shaped clockwork mechanism to indicate the exact tempo in which a work is to be performed. It has a double pendulum whose pace can be alte...

McDonald, Arthur Bruce

(Encyclopedia)McDonald, Arthur Bruce, 1943–, Canadian astrophysicist, Ph.D. California Institute of Technology, 1969. McDonald was a researcher at the Chalk River Nuclear Laboratories in Ottawa, Canada, from 1970...

neutrino

(Encyclopedia)neutrino no͞otrēˈnō [key] [Ital.,=little neutral (particle)], elementary particle with no electric charge and a very small mass emitted during the decay of certain other particles. The neutrino wa...

Theotocopoulos, Domenicos

(Encyclopedia)Theotocopoulos, Domenicos: see Greco, El. ...

oscillator, electronic

(Encyclopedia)oscillator, electronic ŏsˈəlāˌtər [key], electronic circuit that produces an output signal of a specific frequency. An oscillator generally consists of an amplifier having part of its output ret...