viomycin: a basic polypeptide antibiotic (trade name Viocin) administered intramuscularly (along with other drugs) in the treatment of tuberculosis
antibiotic: a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections
leadplant: shrub of sandy woodlands and stream banks of western United States having hoary pinnate flowers and dull-colored racemose flowers; thought to indicate the presence of lead ore