- nisin
- A polypeptide antibiotic produced by Streptococcus lactis; active against certain streptococci, Mycobacterium tuberculosis, Clostridium difficile, and other bacteria.
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ni·sin 'nīs-ən n a polypeptide antibiotic that is produced by a bacterium of the genus Streptococcus (S. lactis) and is used as a food preservative esp. for cheese and canned fruits and vegetables* * *
ni·sin (niґsin) a polypeptide antibiotic produced by Streptococcus lactis and occurring naturally in certain cheeses. Nisin is active against certain streptococci, Mycobacterium tuberculosis, and several other bacteria and is used as a preservative in food processing.
Medical dictionary. 2011.