Noun
tobramycin (uncountable)
(pharmacology) 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.