COLICIN

[co.li.cin] also co.li.cine n [F colicine, fr. col- + -cine (as in streptomycine streptomycin)] (1946): any of various antibacterial substances that are produced by strains of intestinal bacteria (as of Escherichia coli) having a specific plasmid and that often act to inhibit macromolecular synthesis in related strains