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Webster's New World College Dictionary » penicillin
penicillin
penicillin definition
peni·cil·lin (pen′i sil′in)
noun
any of a group of isomeric, antibiotic compounds with the general formula CHNOSR, obtained from the filtrates of certain molds (esp., Penicillium notatum and P. chrysogenum) or produced synthetically
Etymology: < penicillium + -in
Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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