n.
Pronunciation: ' r ō -t ə - ˌ n ō n
Function: noun
Etymology: International Scientific Vocabulary, from Japanese roten derris plant
Date: 1924
: a crystalline insecticide C 23 H 22 O 6 obtained from the roots of several tropical plants (as a derris) that is highly toxic to fish but is of low toxicity to warm-blooded animals and is used especially in home gardens