An aminoglycoside antibiotic similar in action to streptomycin but with a higher risk of ototoxicity.
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di·hy·dro·strep·to·my·cin -.strep-tə-'mīs-ən n a toxic antibiotic C21H41N7O12 formerly used in the treatment of tuberculosis, tularemia, and infections caused by gram-negative organisms but abandoned because of its tendency to impair hearing
Medical dictionary. 2011.