Definitions for bacitracinˌbæs ɪˈtreɪ sɪn
Random House Webster's College Dictionary
bac•i•tra•cinˌbæs ɪˈtreɪ sɪn(n.)
an antibiotic polypeptide derived by the hydrolytic action of Bacillus subtilis on protein.
Origin of bacitracin:
1940–45; baci (llus ) + (Margaret) Trac(y) (b. 1936), American child whose tissues were found to contain Bacillus subtilis+ -in1
a polypeptide antibiotic of known chemical structure effective against several types of Gram-positive organisms; usually applied locally
A nonprescription antibiotic, usually provided in topical ointment form and discovered as a product of the bacterium Bacillus subtilis.
U.S. National Library of Medicine
A complex of cyclic peptide antibiotics produced by the Tracy-I strain of Bacillus subtilis. The commercial preparation is a mixture of at least nine bacitracins with bacitracin A as the major constituent. It is used topically to treat open infections such as infected eczema and infected dermal ulcers. (From Goodman and Gilman, The Pharmacological Basis of Therapeutics, 8th ed, p1140)