Novobiocin

noun

1. An antibiotic, C31H36N2O11, produced by the actinomycete Streptomyces nivens, used primarily in research and to treat infections by gram-positive bacteria in certain animals.
2. An aminocoumarin antibiotic produced by the actinomycete Streptomyces niveus.
3. an antibiotic obtained from an actinomycete and used to treat infections by Gram-positive bacteria