SINCE 1828
derris
noun
der·ris
| \ ˈder-əs
, ˈde-rəs\
, ˈde-rəs\
Definition of derris
1
: a preparation chiefly of ground derris roots used as an insecticide
2
: any of a large genus (Derris) of tropical Eurasian shrubs and woody vines of the legume family including sources of poisons and especially commercial sources of rotenone
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