noun thi·enyl \ˈthīəˌnil\

Definition of thienyl



  1. :  either of two univalent isomeric radicals C4H3S derived from thiophene by removal of a hydrogen atom from either the alpha or 2-position or the beta or 3-position

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 thienyl

International Scientific Vocabulary thiophene + -yl

Seen and Heard

What made you want to look up thienyl? 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!