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parallelogram

[par-uh-lel-uh-gram] /ˌpær əˈlɛl əˌgræm/
noun
1.
a quadrilateral having both pairs of opposite sides parallel to each other.
Origin
1560-1570
1560-70; < Late Latin parallēlogrammum < Greek parallēlógrammon. See parallel, -o-, -gram1
Related forms
parallelogrammatic
[par-uh-lel-uh-gruh-mat-ik] /ˌpær əˌlɛl ə grəˈmæt ɪk/ (Show IPA),
parallelogrammatical, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for parallelogrammatic

parallelogram

/ˌpærəˈlɛləˌɡræm/
noun
1.
a quadrilateral whose opposite sides are parallel and equal in length See also rhombus, rectangle, trapezium, trapezoid
Word Origin
C16: via French from Late Latin, from Greek parallēlogrammon, from parallēlosparallel + grammē line, related to graphein to write
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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parallelogrammatic in Science
parallelogram
  (pār'ə-lěl'ə-grām')   
A four-sided plane figure with opposite sides parallel. Rhombuses and rectangles are parallelograms.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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