WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
preventing infection by inhibiting the growth or action of microorganisms
Word Usage
"It becomes "bactericidal," produces a bactericidal poison (called an alexin) which is usually present in normal blood, but is greatly increased when large numbers of certain poisonous microbes (_e. g._ those of typhoid fever) get into the blood."