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quadrilateral a. 四边形,四边地,四角地 四边形,四边地,四角地 quadrilateral 四边形 quadrilateral 四边形 quadrilateral adj 1: having four sides [synonym: {quadrilateral}, {four-sided}] n 1: a four-sided polygon [synonym: {quadrilateral}, {quadrangle}, {tetragon}] 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. [1913 Webster] 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. [1913 Webster] 2. An area defended by four fortresses supporting each other; as, the Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and Legnano. [1913 Webster] {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. [1913 Webster] 51 Moby Thesaurus words for "quadrilateral": bifacial, bilateral, biquadratic, cube-shaped, cubed, cubic, cubiform, cuboid, diced, dihedral, flanked, four, four-legged, four-rayed, foursquare, handed, lateral, many-sided, multilateral, oblong, one-sided, orthogonal, polyhedral, quadrangular, quadrate, quadric, quadriform, quadrinomial, quadrivalent, quadruped, quartic, quartile, quaternary, rectangular, rhombic, rhomboid, sided, square, tetractinal, tetrad, tetragonal, tetrahedral, tetravalent, three-sided, trapezohedral, trapezoid, trihedral, trilateral, triquetrous, two-sided, unilateral
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