a combining form with the meanings “chemical,” “chemically induced,” “chemistry,” used in the formation of compound words: chemotherapy.
Also especially before elements of Latin origin, chemi-. Also especially before a vowel, chem-.

Origin of chemo-

chem-, extracted from chemical or chemistry + -o- or -i- Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for chemo-


chemi- or before a vowel chem-

combining form

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

Medical definitions for chemo-



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