Also found in: Medical.


or chemi- or chem-
Chemicals; chemical: chemotherapy.

[From chemical.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.




or before a vowel


combining form
(Chemistry) indicating that chemicals or chemical reactions are involved: chemotherapy.
[New Latin, from Late Greek khēmeia; see alchemy]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Both patients underwent radical surgery followed by chemo- and/or radiotherapy.
The patient underwent chemo- and radiotherapy for 3 days, but died of aspiration pneumonia.
Her prognosis was very poor and despite radical surgery and postoperative chemo- and radiotherapy, she died of complications.