Pronunciation: (rōt'n-ōn"), [key]
—n. Chem., Pharm.
a white, crystalline, water-insoluble, poisonous heterocyclic compound, C23H22O6, obtained from derris root: used chiefly as the active ingredient of certain insecticides and in medicine in the treatment of chiggers and scabies.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.