tobramycin

noun1

1. •
   A colorless water-soluble aminoglycoside antibiotic C₁₈H₃₇N₅O₉, isolated from a soil bacterium Streptoalloteichus tenebrarius and used especially against Gram-negative bacteria. When used in combination with loteprednol to treat inflammatory conditions of the eye, tobramycin is marketed under the trademark Zylet.