Definition of gentamicin in US English:



  • A broad-spectrum antibiotic used chiefly for severe systemic infections.

    This antibiotic is derived from bacteria of the genus Micromonospora

    • ‘A combination of penicillin or ampicillin with gentamicin is appropriate for endocarditis caused by enterococci that are not highly resistant to penicillin.’
    • ‘If the infant has been in the nurseries and sepsis is suspected, the antibiotic regimen should include vancomycin and gentamicin.’
    • ‘Some antibiotics, such as gentamicin, penicillin G, tetracycline, methicillin, erythromycin, and vancomycin, are not compatible with heparin.’
    • ‘Treatment with ampicillin supplemented with gentamicin or tobramycin for two to six weeks is best.’
    • ‘The preferred and most effective drug of choice to treat tularemia is streptomycin or gentamicin.’


1960s: from genta- (of unknown origin) + -micin (alteration of -mycin).