a combining form meaning “dry,” used in the formation of compound words: xerophyte.

Nearby words

  1. xerarch,
  2. xerasia,
  3. xeres,
  4. xeric,
  5. xeriscaping,
  6. xerochilia,
  7. xeroderma,
  8. xeroderma pigmentosum,
  9. xerographic,
  10. xerography

Also especially before a vowel, xer-.

Origin of xero-

combining form of Greek xērós dry

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for xero-


before a vowel xer-

combining form

indicating drynessxeroderma

Word Origin for xero-

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

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

Medicine definitions for xero-



Dry; dryness:xeroderma.

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