- a combining form meaning “four,” used in the formation of compound words: quadrilateral.
Origin of quadri-
< Latin; akin to quattuor four
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before a vowel quadr-
- fourquadrilateral; quadrilingual; quadrisyllabic
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
Word Origin and History for quadri-
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.