First Known Use: 1961
Dictionary
ampicillin
noun am·pi·cil·lin \ˌam-pə-ˈsi-lən\
Definition of AMPICILLIN
: a penicillin C16H19N3O4S that is effective against gram-negative and gram-positive bacteria and is used to treat various infections of the urinary, respiratory, and intestinal tracts
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Origin of AMPICILLIN
amino + penicillin
Medical Dictionary
ampicillin
noun am·pi·cil·lin \ˌam-pə-ˈsil-ən\
Medical Definition of AMPICILLIN
: a penicillin C16H19N3O4S that is effective against gram-negative and gram-positive bacteria and is used in anhydrous forms, as the trihydrate, or as the sodium salt to treat various infections of the urinary, respiratory, and intestinal tracts—see penbritin
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