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单词 ryania
释义 ry·a·nia
\rīˈānēə\ noun
(-s)
Etymology: New Latin Ryania (genus name of Ryania speciosa, the shrub from which it is made), from John Ryan, 18th century British physician + New Latin -ia
1. : an insecticide made of a mixture of alkaloids from the ground stems of a tropical So. American shrub (Patrisia pyrifera syn. Ryania speciosa) and used especially against the European corn borer
2. : the plant that yields ryania
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