novobiocin
noun
no·vo·bi·o·cin ˌnō-və-ˈbī-ə-sən 
: a weak dibasic acid C31H36N2O11 that is highly toxic to humans and is sometimes used as an antimicrobial drug in some serious cases of staphylococcic and urinary tract infection
Word History
Etymology
novo- (perhaps modification of Latin niveus snowy, specific epithet of the bacterium Streptomyces niveus) + bi- + -mycin
First Known Use
1956, in the meaning defined above
Medical Definition
novobiocin
noun
no·vo·bi·o·cin ˌnō-və-ˈbī-ə-sən
: a highly toxic antibiotic that is a weak dibasic acid C31H36N2O11 and is used in some serious cases of staphylococcal and urinary tract infection