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[thee-buh-een, thi-bey-een, -in] /ˈθi bəˌin, θɪˈbeɪ in, -ɪn/
noun, Chemistry.
a white, crystalline, slightly water-soluble, poisonous alkaloid, C 19 H 21 NO 3 , present in opium in small quantities, but having a strychninelike rather than a narcotic effect.
Origin of thebaine
1890-95; < New Latin thēba(ia) opium of Thebes, Egypt (alteration of Latin Thēbaea, feminine of Thēbaeus Theban) + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for thebaine


/ˈθiːbəˌiːn; θɪˈbeɪiːn; -aɪn/
a poisonous white crystalline alkaloid, found in opium but without opioid actions. Formula: C19H21NO3 Also called paramorphine
Word Origin
C19: from New Latin thebaia opium of Thebes (with reference to Egypt as a chief source of opium) + -ine²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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thebaine in Medicine

thebaine the·ba·ine (thē'bə-ēn', thĭ-bā'ĭn)
A poisonous crystalline alkaloid obtained from opium. Also called paramorphine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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