Definition of Quadrilateral

1. Noun. A four-sided polygon.

Exact synonyms: Quadrangle, Tetragon
Generic synonyms: Polygon, Polygonal Shape
Specialized synonyms: Parallelogram, Trapezium, Trapezoid
Derivative terms: Quadrangular, Tetragonal



2. Adjective. Having four sides.
Exact synonyms: Four-sided
Similar to: Many-sided, Multilateral

Definition of Quadrilateral

1. a. Having four sides, and consequently four angles; quadrangular.

2. n. A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines.

Definition of Quadrilateral

1. Noun. a polygon having four sides. ¹

2. Adjective. having four sides. ¹

¹ Source: wiktionary.com

Definition of Quadrilateral

1. [n -S]

Medical Definition of Quadrilateral

1. 1. 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, 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. Source: Websters Dictionary (01 Mar 1998)

Quadrilateral Pictures

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Lexicographical Neighbors of Quadrilateral

quadrigas
quadrigatus
quadrigeminal
quadrigeminal bodies
quadrigeminal lamina
quadrigeminal plate
quadrigeminal pulse
quadrigeminal rhythm
quadrigeminous
quadrigeminum
quadrigeminus
quadrigeminy
quadrigenarious
quadrijugate
quadrijugous
quadrilateral (current term)
quadrilateral space
quadrilaterals
quadrilateration
quadrilingual
quadriliteral
quadriliterals
quadrille
quadrille paper
quadrilles
quadrillion
quadrillionfold
quadrillions
quadrillionth
quadrillionths

Literary usage of Quadrilateral

Below you will find example usage of this term as found in modern and/or classical literature:

1. Projective Geometry by Oswald Veblen, John Wesley Young (1910)
"It consists of four quadrilateral. It consists of four vertices and six sides. ... quadrilateral.* The assumptions A and E on which all our reasoning is ..."

2. The Advanced Part of A Treatise on the Dynamics of a System of Rigid Bodies by Edward John Routh (1892)
"Network with quadrilateral openings. To bring these particles into order we ... Show that the geometrical peculiarity of this quadrilateral network is that ..."

3. The Advanced Part of A Treatise on the Dynamics of a System of Rigid Bodies by Edward John Routh (1892)
"Network with quadrilateral openings. To bring these particles into order we ... Show that the geometrical peculiarity of this quadrilateral network is that ..."

4. Trilinear Coordinates and Other Methods of Modern Analytical Geometry of Two by William Allen Whitworth (1866)
"So the critical circumscribed conic of the quadrilateral CAC'A ' touches the four straight lines Cc, Aa, C'c, A'a, and the critical circumscribed conic of ..."

5. The Theory and Practice of Surveying: Designed for the Use of Surveyors and by John Butler Johnson (1886)
"In the quadrilateral in Fig. 142 there are eight observed angles, A,, ... In the quadrilateral ABCD we have four triangles in which all the angles have been ..."

6. Trilinear Coordinates and Other Methods of Modern Analytical Geometry of Two by William Allen Whitworth (1866)
"So the critical circumscribed conic of the quadrilateral CAC'A' touches the ... Amongst the conies inscribed in the quadrilateral BCBC' there is one whose ..."

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