Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary


noun the·ba·ine \thə-ˈbā-ˌēn\

Medical Definition of thebaine

  1. :  a poisonous crystalline alkaloid C19H21NO3 found in opium in small quantities, related chemically to morphine and codeine, and possessing a sharp astringent taste and a tetanic action like strychnine

Seen and Heard

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