Definition of ryania
1 : an insecticide made of a mixture of alkaloids from the ground stems of a tropical South American shrub (Patrisia pyrifera synonym Ryania speciosa) and used especially against the European corn borer
2 : the plant that yields ryania
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Origin and Etymology of ryania
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
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