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quadri-

1.
a combining form meaning “four,” used in the formation of compound words:
quadrilateral.
Also, quadra-, quadru-; especially before a vowel, quadr-.
Origin
< Latin; akin to quattuor four
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for quadri-

quadri-

combining form
1.
four: quadrilateral, quadrilingual, quadrisyllabic
Word Origin
from Latin; compare quattuor four
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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Word Origin and History for quadri-

before vowels quad- (before -p- often quadru-, from an older form in Latin), word-forming element meaning "four, four times, having four, consisting of four," from Latin quadri-, related to quattor "four" (see four).

Online Etymology Dictionary, © 2010 Douglas Harper
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quadri- in Medicine

quadri- or quadr-
pref.

  1. Four: quadriplegia.

  2. Square: quadrate.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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