[ 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.

Nearby words

  1. colin,
  2. colinear,
  3. colipase,
  4. coliphage,
  5. coliseum,
  6. colitic,
  7. colitis,
  8. colitoxemia,
  9. coliuria,
  10. coll' arco

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.