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fifth column
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Isandhlwana
Isandhlwana. Hill, located 75 miles north of Pietermaritzburg (South Africa), site of an important battle in the Zulu War. Part of the centre column of a three-pronged British invasion of Zululand, having underestimated its opponents, was surprised by a Zulu army on 22 January 1879. Disciplined... Read more |
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cloister
cloister unroofed space forming part of a religious establishment and surrounded by the various buildings or by enclosing walls. Generally, it is provided on all sides with a vaulted passageway consisting of continuous colonnades or arcades opening onto a court. The cloister is a characteristic... Read more |
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vertebral column
vertebral column (backbone; spinal column; spine) A flexible bony column in vertebrates that extends down the long axis of the body and provides the main skeletal support. It also encloses and protects the spinal cord and provides attachment for the muscles of the back. The vertebral column consists... Read more |
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sapwood
sapwood relatively thin, youngest, outer part of the woody stem of a tree, the part that conducts water and dissolved materials. In the cross section of a tree, the sapwood is recognizable by its texture and color; it is softer and lighter than the inner heartwood . As the tree grows in diameter,... Read more |
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entasis
entasis [Gr.,=stretching], the slight convex curvature of a classical column that diminishes in diameter as it rises. This device, as used by Greek builders, was of extreme subtlety, the freehand curvature being merely sufficient to guard the contours of the column from any appearance of inward... Read more |
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column
column vertical architectural support, circular or polygonal in plan. A column is generally at least four or five times as high as its diameter or width; stubbier freestanding masses of masonry are usually called piers or pillars, particularly those with a rectangular plan. In fully developed... Read more |
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periodic table
periodic table chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley . In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled Periodic Table... Read more |
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chromatography
chromatography , resolution of a chemical mixture into its component compounds by passing it through a system that retards each compound to a varying degree; a system capable of accomplishing this is called a chromatograph. The retarding system can be a surface adsorbant, such as silica, alumina,... Read more |
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colonnade
colonnade , a row of columns usually supporting a roof. Colonnades were popular with the Greeks and Romans, who employed them in the stoa and the portico ; they have continued to be used throughout the Middle Ages, the Renaissance, and modern times. See column .... Read more |
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