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Altay

(Encyclopedia)Altay: see Altai, mountain system, Asia. ...

celestial equator

(Encyclopedia)celestial equator: see equatorial coordinate system. ...

Mitchell, Mount

(Encyclopedia)Mitchell, Mount, peak, 6,684 ft (2,037 m) high, W N.C., in the Black Mts. of the Appalachian system; highest peak E of the Mississippi River. ...

Tien Shan

(Encyclopedia)Tien Shan, mountain system: see Tian Shan. ...

encounter theory

(Encyclopedia)encounter theory, in astronomy, see solar system. ...

European Currency Unit

(Encyclopedia)European Currency Unit: see European Monetary System. ...

international gold standard

(Encyclopedia)international gold standard: see international monetary system. ...

norepinephrine

(Encyclopedia)norepinephrine nôrˌĕpīnĕfˈrən [key], a neurotransmitter in the catecholamine family that mediates chemical communication in the sympathetic nervous system, a branch of the autonomic nervous sys...

multiple sclerosis

(Encyclopedia)multiple sclerosis (MS), chronic, slowly progressive autoimmune disease in which the body's immune system attacks the protective myelin sheaths that surround the nerve cells of the brain and spinal co...

Savigny, Friedrich Karl von

(Encyclopedia)Savigny, Friedrich Karl von frēˈdrĭkh kärl fən säˈvĭnyē [key], 1779–1861, German jurist and legal historian, a founder of the historical school of jurisprudence. He taught (1810–42) Roman...