An aminoglycoside antibiotic similar in action to streptomycin but with a higher risk of ototoxicity. ... (05 Mar 2000) ... 
[n] - antibiotic consisting of a hydrogenated form of streptomycin
noun antibiotic consisting of a hydrogenated form of streptomycin; used against tuberculosis and tularemia and Gram-negative organisms
an antibiotic, CHNO, derived by organic synthesis from and believed to be less toxic than streptomycin: used in the form of its sulfate chiefly in the treatment of tuberculosis.