Definition of "bactericidal" [bac•te•ri•ci•dal]

• That kills bacteria. (adjective)
• Of or pertaining to a bactericide. (adjective)

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• "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."
• "The two antibiotic products tested had some antibacterial effectiveness against the superbug while Staphaseptic had a genuine "bactericidal" effect - meaning it killed the MRSA bacteria and reduced the number by a factor of 1,000."
• "Many bleaches have strong bactericidal properties, and are used for disinfecting and sterilizing."