plural -s
: 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
: the plant that yields ryania

Word History


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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Dictionary Entries Near ryania

Cite this Entry

“Ryania.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ryania. Accessed 3 Dec. 2023.

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