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Quadrilateral   Listen
noun
Quadrilateral  n.  
1.
(Geom.) A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines.
2.
An area defended by four fortresses supporting each other; as, the Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and Legnano.
Complete quadrilateral (Geom.), the figure made up of the six straight lines that can be drawn through four points, A, B, C, I, the lines being supposed to be produced indefinitely.



adjective
Quadrilateral  adj.  Having four sides, and consequently four angles; quadrangular.






Collaborative International Dictionary of English 0.48








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"Quadrilateral" Quotes from Famous Books



... Gwent. Earl Richard devastated his lands so effectively that the king could not support his army on them, and was compelled to move up the Wye valley towards the castles of Monmouth, Skenfrith, Whitecastle, and Grosmont, the strong quadrilateral of Upper Gwent which still remained in the hands of the king's friends. Marching to the most remote of these, Grosmont, on the upper Monnow, Henry spent several days in the castle, while his army ...
— The History of England - From the Accession of Henry III. to the Death of Edward III. (1216-1377) • T.F. Tout

... extended in surgical position, as seen in Plates 3 and 4, its general outline assumes a quadrilateral shape, approaching to a square. The sides of this square are formed anteriorly by the line ranging from the mental symphysis to the top of the sternum, and posteriorly by a line drawn between the occiput and shoulder. ...
— Surgical Anatomy • Joseph Maclise

... his son Tedaldo the title of Count of Reggio and Modena; and this title was soon after raised to that of Marquis. The Marches governed as Vicar of the Empire by Tedaldo included Reggio, Modena, Ferrara, Brescia, and probably Mantua. They stretched, in fact, across the north of Italy, forming a quadrilateral between the Alps and Apennines. Like his father, Tedaldo adhered consistently to the Imperial party; and when he died and was buried at Canossa, he in his turn bequeathed to his son Bonifazio a power and jurisdiction increased ...
— Sketches and Studies in Italy and Greece, Complete - Series I, II, and III • John Symonds

... figures are infinite by infinitude of number. Now there are various species of figures, such as trilateral, quadrilateral and so on; and as an infinitely numerable multitude is not all at once reduced to act, so neither is the multitude ...
— Summa Theologica, Part I (Prima Pars) - From the Complete American Edition • Thomas Aquinas

... be seen by reference to our Plate No. 1, which is an exact copy from Rosny's work, this page consists of three divisions: First, an inner quadrilateral space, in which there are a kind of cross or sacred tree; two sitting figures, one of which is a female, and six characters. Second, a narrow space or belt forming a border to the inner area, from which it is separated by a single line; it is separated from the outer space by a double ...
— Notes on Certain Maya and Mexican Manuscripts • Cyrus Thomas


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