a combining form meaning “dry,” used in the formation of compound words: xerophyte.
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. 2020

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

Medical 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.