thebaine

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/θɪˈbeɪiːn/US:USA pronunciation: respellingUSA pronunciation: respelling(thē′bə ēn′, thi bā′ēn, -in)


WordReference Random House Unabridged Dictionary of American English © 2026
the•ba•ine  (thē′bə ēn′, thi bā′ēn, -in),USA pronunciation n. [Chem.]
  1. Chemistrya white, crystalline, slightly water-soluble, poisonous alkaloid, C19H21NO3, present in opium in small quantities, but having a strychninelike rather than a narcotic effect.
  • Neo-Latin thēba(ia) opium of Thebes, Egypt (alteration of Latin Thēbaea, feminine of Thēbaeus Theban) + -ine2
  • 1890–95

Collins Concise English Dictionary © HarperCollins Publishers::
thebaine / ˈθiːbəˌiːn θɪˈbeɪiːn -aɪn/
  1. a poisonous white crystalline alkaloid, found in opium but without opioid actions. Formula: C19H21NO3
Etymology: 19th Century: from New Latin thebaia opium of Thebes (with reference to Egypt as a chief source of opium) + -ine2
'thebaine' also found in these entries (note: many are not synonyms or translations):
paramorphine

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