a synthetic antibiotic, CHNOS, derived from penicillin, having resistance to acids so that it can be taken orally to fight a wide range of bacterial infections
Origin of ampicillinam(ino)- + p(en)icillin
A broad-spectrum semisynthetic penicillin, C16H19N3O4S, that is used, often in the form of its sodium salt, to treat infections of the intestinal, urinary, and respiratory tracts.
Origin of ampicillinam(ino)- p(en)icillin
- (pharmacology) A broad-spectrum antibiotic having a beta-lactam structure.