a combining form with the meanings “chemical,” “chemically induced,” “chemistry,” used in the formation of compound words: chemotherapy.
Origin of chemo-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
chemi- or before a vowel chem-
indicating that chemicals or chemical reactions are involvedchemotherapy
Word Origin for chemo-
New Latin, from Late Greek khēmeia; see alchemy
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
before vowels chem-, word-forming element denoting "relation to chemical action or chemicals," from comb. form of chemical (adj.), used to form scientific compound words from c.1900.
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.