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solid-state physics

(Encyclopedia)solid-state physics, study of the properties of bulk matter rather than those of the individual particles that compose it. Solid-state physics is concerned with the properties exhibited by atoms and m...

ray, in zoology

(Encyclopedia)ray, extremely flat-bodied cartilaginous marine fish, related to the shark. The pectoral fins of most rays are developed into broad, flat, winglike appendages, attached all along the sides of the head...

Lima, city, United States

(Encyclopedia)Lima līˈmə [key], city (1990 pop. 45,549), seat of Allen co., NW Ohio; settled 1831, inc. 1842. Located in a fertile farm area, it is a processing and marketing center for grain, dairy, and meat pr...

Kota

(Encyclopedia)Kota kōˈtə [key], city (1991 pop. 537,371), Rajasthan state, NW India, on the Chambal River. Kota, enclosed by a massive wall, is a district administrative center and a market for sugarcane, oilsee...

ammeter

(Encyclopedia)ammeter ămˈmēˌtər [key], instrument used to measure the magnitude of an electric current of several amperes or more. An ammeter is usually combined with a voltmeter and an ohmmeter in a multipurp...

Gujranwalla

(Encyclopedia)Gujranwalla go͝ojˌränˈvälə [key], city, NE Pakistan. A road and rail hub, with linkage to Peshawar ...

Oersted, Hans Christian

(Encyclopedia)Oersted or Ørsted, Hans Christian häns krĭsˈtyän örˈstĭᵺ [key], 1777–1851, Danish physicist and chemist. He was professor at Copenhagen from 1806. His discovery (1819) that a magnetic need...

Branly, Édouard

(Encyclopedia)Branly, Édouard ādwärˈ bräNlēˈ [key], French physicist and physician. He was professor of physics at the Catholic Institute, Paris, from 1875. He developed (1890) a coherer for the detection of...

Waterford, town, United States

(Encyclopedia)Waterford, town (1990 pop. 17,930), New London co., SE Conn., on Long Island Sound; settled c.1653, inc. as a separate town from New London, 1801. Mainly residential, it has a recording and film studi...

Wausau

(Encyclopedia)Wausau wôˈsô [key], city (1990 pop. 37,060), seat of Marathon co., central Wis., on the Wisconsin River; settled 1839, inc. 1872. It is an industrial, commercial, insurance, and agricultural city i...