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单词 derris
释义 derris
 /der"is/,  n.  
 any East Indian plant belonging to the genus Derris, of the legume family, esp. D. elliptica, the roots of which contain rotenone and are used as an insecticide.
 [1855-60; NL < Gk: a covering, deriv. of déros skin, hide; see DERMA1]
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