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di·hy·dro·strep·to·my·cin | \ -ˌstrep-tə-ˈmīs-ᵊn 
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\Medical Definition of dihydrostreptomycin
: 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
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