quadrilateral

n. நாற்கட்டம், நாற்கோண வரைவடிவம்; நான்கெல்லைப் பரப்பு; (பெ) நாற்கோணமான, நாலு பக்கங்களையுடைய.

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Quad`ri*lat"er*al, a. Etym: [L. quadrilaterus: cf. F. quadrilatère, quadrilatéral. See Quadri- and Lateral.] Defn: Having four sides, and consequently four angles; quadrangular. Quad`ri*lat"er*al, n. 1. (Geom.) Defn: 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.

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