noun ry·a·nia \rīˈānēə\

Definition of ryania



  1. 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. 2 :  the plant that yields ryania

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

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

Seen and Heard

What made you want to look up ryania? Please tell us where you read or heard it (including the quote, if possible).


feeling or affected by lethargy

Get Word of the Day daily email!