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n. Any of various usually woody vines of the genus Derris of tropical Asia, whose roots yield the insecticide rotenone.

n. A climbing leguminous plant of Southeast Asia and the southwest Pacific Islands, whose roots are a source of rotenone.

n. any of various usually woody vines of the genus Derris of tropical Asia whose roots yield the insecticide rotenone; several are sources of native fish and arrow poisons

"For example, rotenone, an insecticide derived from a tropical root called derris, is as poisonous to humans as organophosphate chemical pesticides."

shrub    bush