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
gnetaceae: plants having small unisexual flowers and fleshy or winged fruit: in some classifications includes the genera Ephedra and Welwitschia as well as genus Gnetum