n. A poisonous alkaloid, paramorphine, obtained from opium; not used in medicine.
the GNU version of the Collaborative International Dictionary of English
n. A poisonous alkaloid, C19H21NO3, found in opium in small quantities, having a sharp, astringent taste, and a tetanic action resembling that of strychnine.
The Century Dictionary and Cyclopedia
n. An alkaloid, C19H21NO3, obtained from opium. It is a white crystalline base having an acrid taste, and analogous to strychnine in its physiological effects. Also called thebaia, paramorphine.
Word Usage
"Injecting salutaridine yielded a five-ringed opiate called thebaine, and injecting thebaine generated three similarly structured opiates: codeine, oripavine and morphine."