Quadrilateral
Quadrilateral , adjective
[Latin quadrilaterus: compare French quadrilatère, quadrilatéral. See Quadri- and Lateral.]
Having four sides, and consequently four angles; quadrangular.
Quadrilateral , noun
1.
(Geometry) 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.
Collocations (1)
Complete quadrilateral (Geometry) , 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.