from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An antibiotic produced by the bacterium Bacillus polymyxa or B. colistinus that is effective against a wide range of gram-negative bacteria and is used especially in the treatment of infections of the gastrointestinal tract.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A polymixin antibiotic effective against a range of gram-negative bacteria
From New Latin Colistīnus, species name, from coli-.(American Heritage® Dictionary of the English Language, Fourth Edition)