Aztreonam Definition
 ăz-trēə-năm 
    noun
  
 A synthetic antibiotic, C13 H17 N5 O8 S2 , that acts against a wide spectrum of gram-negative bacteria.
 American Heritage Medicine 
Synonyms: 
  Origin of Aztreonam
-  Variant of azthreonam az(o)– threon(ine) (used as a template for the antibiotic's chirality) (beta-lact)am cyclic amide occurring in penicillins beta-lactamase From American Heritage Dictionary of the English Language, 5th Edition 
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