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

Origin of AMPICILLIN

amino + penicillin
First Known Use: 1961

ampicillin

noun am·pi·cil·lin \ˌam-pə-ˈsil-ən\   (Medical Dictionary)

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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