n.
Any of a group of broad-spectrum antibiotics, such as streptomycin, derived from species of Streptomyces or Micromonospora bacteria and used to treat infections caused by gram-negative bacteria.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
