English Dictionary: quadrilateral | by the DICT Development Group |
3 results for quadrilateral | |
From WordNet (r) 3.0 (2006) [wn]: | |
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From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
Quadrilateral \Quad`ri*lat"er*al\, a. [L. quadrilaterus: cf. F. quadrilat[8a]re, quadrilat[82]ral. See {Quadri-} and {Lateral}.] Having four sides, and consequently four angles; quadrangular. | |
From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
Quadrilateral \Quad`ri*lat"er*al\, 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. |