[ kuh-lis-tin ]
/ kəˈlɪs tɪn /

noun Pharmacology.

a toxic antibiotic polypeptide, C45H85O10N13, produced by the bacterium Bacillus colistinus, used in sulfate form against a broad spectrum of microorganisms and in the treatment of severe gastroenteritis.

Origin of colistin

1950–55; < New Latin colistinus epithet for a variety of Bacillus polymyxa, equivalent to coli- (see coliform) + -stinus, apparently an arbitrarily chosen suffix; cf. -in2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for colistin

[ kə-lĭstĭn, kō- ]


An antibiotic produced by the bacterium Bacillus polymyxa or B. colistinus that is effective against a range of gram-negative bacteria and is used especially in the treatment of infections of the gastrointestinal tract.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.