Any one of a group of bacteriocidal antibiotics derived from species of Streptomyces or Micromonosporum and characterized by two or more amino sugars joined by a glycoside linkage to a central hexose; aminoglycoside’s act by causing misreading and inhibition of protein synthesis on bacterial ribosomes and are effective against aerobic Gram-negative bacilli and Mycobacterium tuberculosis. Some commonly used aminoglycoside’s are streptomycin, neomycin, and gentamycin.