[vang-kuh-mahy-sin, van-]
noun Pharmacology.
a bactericidal antibiotic, C 66 H 75 ClN 9 O 24 , produced by Streptomyces orientalis, used in the treatment of antibiotic-associated colitis and endocarditis.

1956; vanco-, of unexplained orig. + -mycin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vancomycin (ˌvænkəʊˈmaɪsɪn)
an antibiotic effective against most Gram-positive organisms. It is given by intravenous infusions for serious infections that are resistant to other antibiotics

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

vancomycin van·co·my·cin (vāng'kə-mī'sĭn, vān'kə-)
An antibiotic that is produced by the actinomycete Streptomyces orientalis, and is effective against staphylococci and spirochetes.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
They would have allowed ancient bacteria to shrug off many modern drugs such as tetracyclines, beta-lactams and vancomycin.
This left vancomycin as the only effective agent available at the time.
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