Webster’s Revised Unabridged Dictionary · 1913
Thebaine
The·ba′ine (thē·bā′ĭn or ·ēn), n. [So called from a kind of Egyptian opium produced at Thebes.] (Chem.) A poisonous alkaloid, C19H21NO3, found in opium in small quantities, having a sharp, astringent taste, and a tetanic action resembling that of strychnine.