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quadrilateral |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Quadrilateral \Quad`ri*lat"er*al\, a. [L. quadrilaterus: cf F. quadrilat[`e]re, quadrilat['e]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. From WordNet r 1.6 [wn]: quadrilateral adj : having four sides [syn: {four-sided}] n : a four-sided polygon [syn: {quadrangle}, {tetragon}]
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