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quadrilateral

 - 4 dictionary results

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.
Cite This Source Link To quadrilateral
quad·ri·lat·er·al   (kwŏd'rə-lāt'ər-əl)   


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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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Word Origin & History

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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Medical Dictionary

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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