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noun Pharmacology.
  1. a highly toxic aminoglycoside antibiotic, C18H37N5O9, derived from Streptomyces tenebarius, used in the treatment of serious infections due to susceptible Gram-positive and Gram-negative organisms.

Origin of tobramycin

1970–75; perhaps (Strep)to(myces) (tene)bra(rias) + -mycin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
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