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Federal Aviation Administration

(Encyclopedia)Federal Aviation Administration (FAA), component of the U.S. Department of Transportation that sets standards for the air-worthiness of all civilian aircraft, inspects and licenses them, and regulates...

Russian art and architecture

(Encyclopedia)Russian art and architecture, the artistic and architectural production of the geographical area of Russia. Around the turn of the century Mir Iskusstva (World of Art Group) was initiated, a movemen...

leprosy

(Encyclopedia)leprosy or Hansen's disease hănˈsənz [key], chronic, mildly infectious malady capable of producing, when untreated, various deformities and disfigurements. It is caused by the rod-shaped bacterium ...

strategy and tactics

(Encyclopedia)strategy and tactics, in warfare, related terms referring, respectively, to large-scale and small-scale planning to achieve military success. Strategy may be defined as the general scheme of the condu...

W and Z particles

(Encyclopedia)W and Z particles, elementary particles that mediate, or carry, the fundamental force associated with weak interactions. The discovery of the W and Z particles at CERN near Geneva, Switzerland, in the...

dandruff

(Encyclopedia)dandruff, excessive flaking of skin from the scalp, apparent as dry or greasy diffuse scaling with variable itching. It is the sign of a skin disease, such as seborrhea or a fungal infection. Treatmen...

Spanish colonial art and architecture

(Encyclopedia)Spanish colonial art and architecture, fl. 16th–early 19th cent., the artistic production of Spain's colonies in the New World. These works followed the historical development of styles previously e...

Huntingdon, Selina Hastings, countess of

(Encyclopedia)Huntingdon, Selina Hastings, countess of, 1707–91, English religious leader, patron of the Calvinistic Methodists. She was closely associated with the Wesleys and George Whitefield. When they split,...

Schengen Agreement

(Encyclopedia)Schengen Agreement shĕngˈən [key], agreement signed in 1985 in Schengen, Luxembourg, by several European Community (now the European Union; EU) to establish a mutual visa policy that would permit f...

river blindness

(Encyclopedia)river blindness or onchocerciasis, disease caused by the parasitic nematode worm Onchocerca volvulus. The worm larvae are transmitted by the bites of blackflies (genus Simulium) that live in fast movi...