noun Pharmacology.
a synthetic antimicrobial substance, C 6 H 9 N 3 O 3 , used chiefly in the treatment of infections, such as Trichomonas vaginalis and certain anaerobic bacterial infections.

1960–65; contraction of 2-methyl-5-nitroimidazole part of the chemical name Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
metronidazole (ˌmɛtrəˈnaɪdəˌzəʊl)
a pale yellow crystalline compound used to treat vaginal trichomoniasis. Formula: C6H9N3O3
[C20: from me(thyl) + (ni)tro- + -n- + (im)id(e) + azole]

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

metronidazole me·tro·ni·da·zole (mět'rə-nī'də-zōl')
A synthetic antimicrobial drug used in the treatment of vaginal trichomoniasis and intestinal amebiasis.

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
Other antibiotics that are sometimes used include tetracycline, metronidazole, and ciprofloxacin.
The antibiotic metronidazole is commonly used to cure the infection.
Antibiotics, usually ciprofloxacin or metronidazole, may be used to treat fistulas.
The drug metronidazole, commonly used to treat intestinal parasites, is best avoided in the first trimester.
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