[ bas-i-trey-sin ]
/ ˌbæs ɪˈtreɪ sɪn /

noun Pharmacology.

an antibiotic polypeptide derived by the hydrolytic action of Bacillus subtilis on protein, primarily used topically in the treatment of superficial infections caused by susceptible Gram-positive organisms.

Origin of bacitracin

1940–45; baci(llus) + (Margaret) Trac(y) (born 1936), American child whose tissues were found to contain Bacillus subtilis + -in2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for bacitracin

/ (ˌbæsɪˈtreɪsɪn) /


an antibiotic used mainly in treating bacterial skin infections: obtained from the bacterium Bacillus subtilis

Word Origin for bacitracin

C20: baci (llus) + -trac- from Margaret Tracy (born 1936), American girl in whose blood Bacillus subtilis was found; see -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for bacitracin

[ băs′ĭ-trāsĭn ]


A polypeptide antibiotic obtained from a strain of the bacterium Bacillus subtilis and used as a topical treatment for certain bacterial infections, especially those caused by cocci.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.