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Quadrilateral - 7 dictionary results
Quadrilaterals
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quad⋅ri⋅lat⋅er⋅al

  [kwod-ruh-lat-er-uhl]
Use Quadrilateral in a Sentence
–adjective
1. having four sides.
–noun
2. a plane figure having four sides and four angles.
3. something of this form.
4. Geometry.
a. a figure formed by four straight lines that have six points of intersection.
b. a polygon with four sides.
5. the space enclosed between and defended by four fortresses.
Origin:
1640–50; < L quadrilater(us) four-sided + -al 1 . See quadri-, lateral

Related forms:
quad⋅ri⋅lat⋅er⋅al⋅ly, adverb
quad⋅ri⋅lat⋅er⋅al⋅ness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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quad·ri·lat·er·al   (kwŏd'rə-lāt'ər-əl)   


(click for larger image in new window)
n.   Mathematics
A polygon having four sides.
adj.  Having four sides.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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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.

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.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : Quadrilateral
Spanish: cuadrilátero,
German: das Viereck,
Japanese: ４辺形
More Translations »

quadrilateral  (n.)
1650, from L. quadrilaterus, from quadri- "four" + latus (gen. lateris) "side" (see oblate (n.)).
Online Etymology Dictionary, © 2001 Douglas Harper
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Main Entry: quad·ri·lat·er·al
Pronunciation: "kwäd-r&-'lat-&-r&l, -'la-tr&l
Function: adjective
: havingfour sides quadrilateral muscle>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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quadrilateral   (kwŏd'rə-lāt'ər-əl)  Pronunciation Key 
A polygon that has four sides, such as a rectangle or rhombus.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Quadrilaterals
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