A polypeptide antibiotic of known chemical structure effective against several types of Gram-positive organisms

• Usually applied locally

Wiktionary Word definitions in Wiktionary
n. A nonprescription antibiotic, usually provided in topical ointment form and discovered as a product of the bacterium ''Bacillus subtilis''.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
bacitracin \bacitracin\ n. (1940) [Bacillus + Margaret Tracy, (a child whose tissues contained Bacillus subtilis ) + -in. --RHUD.] a polypeptide antibacterial antibiotic of known chemical structure effective against several types of Gram-positive organisms, ...

WordNet Word definitions in WordNet
n. a polypeptide antibiotic of known chemical structure effective against several types of Gram-positive organisms; usually applied locally

Wikipedia Word definitions in Wikipedia
Bacitracin is a mixture of related cyclic peptides produced by organisms of the licheniformis group of Bacillus subtilis var Tracy, first isolated in 1945. These peptides disrupt both gram positive and gram negative bacteria by interfering with cell wall ...