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 semisynthetic penicillin that has a broader antibacterial spectrum of action than that of penicillin G, is effective against gram-negative and gram-positive bacteria, and is used to treat infections of the intestinal, urinary, and respiratory tracts.
Origin of ampicillinBlend of amino– and penicillin.
- (pharmacology) A broad-spectrum antibiotic having a beta-lactam structure.