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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 Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for bacterio-


combining form
indicating bacteria or an action or condition relating to or characteristic of bacteria: bacteriology, bactericide, bacteroid
Word Origin
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
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bacterio- in Medicine

bacterio- or bacteri- or bacter-
Bacteria; bacterial: bacteriology.

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