Definition of tobramycin in US English:



  • A bacterial antibiotic used chiefly to treat pseudomonas infections.

    The drug is obtained from the bacterium Streptomyces tenebrarius

    • ‘Half were given normal treatment, the other half four antibiotics (polymyxin E, tobramycin, amphotericin B, and cefotaxime).’
    • ‘Treatment with ampicillin supplemented with gentamicin or tobramycin for two to six weeks is best.’
    • ‘Valproic acid is an anticonvulsant drug used to treat various seizures and tobramycin is an antibiotic used to control many bacterial infections.’
    • ‘The organism was sensitive to amikacin, gentamicin, and tobramycin.’
    • ‘First, you attributed the rise in serum creatinine to the administration of 2 aminoglycoside antibiotics, gentamycin and tobramycin.’


1970s: from to- (of unknown origin) + Latin ( tene)bra(rius) ‘belonging to darkness’ (part of the name of the bacterium) + -mycin.