MW (not a typo): Main Entry:rotenone Pronunciation:*r*t*n**n Function:noun Inflected Form:-s Etymology:International Scientific Vocabulary roten- (from Japanese roten derris plant) + -one [etymologies are approximate!--rwg] : a crystalline pentacyclic compound C23H22O6 that is related to isoflavone, found especially in derris and cube roots, used in insecticides and in primitive fish and arrow poisons, and of low toxicity to warm-blooded animals --rwg [So the arrows are only good against big reptiles? And obviously first degree murderers.]