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searchlight

(Encyclopedia)searchlight, device, usually swiveled, using a lens and reflecting surface to direct a powerful beam of light of nearly parallel rays. In 1892 such apparatus was used along the English Channel in coas...

alternating current

(Encyclopedia)alternating current, abbr. AC, a flow of electric charge that undergoes periodic reverses in direction. In North America ordinary household current alternates at a frequency of 60 times per second. Se...

Avon Lake

(Encyclopedia)Avon Lake āˈvän [key], city (2020 pop. 25,206), Lorain co., NE Ohio, on Lake Erie; inc. 1917. It is chiefly a residential suburb of the Cleveland–NE Ohio industrial a...

heating

(Encyclopedia)CE5 Typical warm-air heating system heating, means of making a building comfortably warm relative to a colder outside temperature. Old, primitive methods of heating a building or a room within it ...

insulation

(Encyclopedia)insulation ĭnˌsəlāˈshən, ĭnˌsyo͝o– [key], use of materials or devices to inhibit or prevent the conduction of heat or of electricity. Common heat insulators are, fur, feathers, fiberglass, ...

radiator

(Encyclopedia)radiator, device used to heat an area surrounding it or to cool a fluid circulating within it. The familiar radiators of steam and hot water heating systems in buildings are misnamed, as they operate ...

Metuchen

(Encyclopedia)Metuchen mətŭchˈən [key], borough (1990 pop. 12,804), Middlesex co., NE N.J.; settled before 1700, inc. 1900. Although chiefly residential, it manufactures metal products, packaging equipment, mac...

Appleton

(Encyclopedia)Appleton, city (2020 pop. 75,644), seat of Outagamie co., E Wis., on the Fox River near its exit from the northern end of Lake Winnebago, in a dairying and stockraising region; inc. 1857. ...

Aubusson

(Encyclopedia)Aubusson ōbüsôN [key], town (1993 est. pop. 5,546), Creuse dept., central France, in the former province of Marche, on the Creuse River. Its famous tapestry and carpet manufactures date from the 15...

anode

(Encyclopedia)anode ănˈōd [key], electrode through which current enters an electric device. In electrolysis, it is the positive electrode in the electrolytic cell. ...