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a combining form meaning “dry,” used in the formation of compound words:
Also, especially before a vowel, xer-.
Origin of xero-
combining form of Greek xērós dry Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for xero-


combining form
indicating dryness: xeroderma
Word Origin
from Greek xēros dry
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 xero-

before vowels, xer-, word-forming element meaning "dry," from Greek xero-, comb. form of xeros "dry" (see xerasia).

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

xero- or xer-
Dry; dryness: xeroderma.

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