a combining form meaning “bacteria,” used in the formation of compound words: bactericide; bacteriuria.
Also bacter-, bacterio-.

Origin of bacteri-

< Greek baktḗrion little staff; see bacterium Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for bacterio-


bacteri- or sometimes before a vowel bacter-

combining form

indicating bacteria or an action or condition relating to or characteristic of bacteriabacteriology; bactericide; bacteroid

Word Origin for bacterio-

New Latin, from bacteria
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 bacterio-



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