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national grasslands
(Encyclopedia)national grasslands: see National Forest System. ...crypts of Lieberkühn
(Encyclopedia)crypts of Lieberkühn: see digestive system. ...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...Browse by Subject
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