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thebaine

[thee-buh-een, thi-bey-een, -in]
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noun Chemistry.
  1. a white, crystalline, slightly water-soluble, poisonous alkaloid, C19H21NO3, present in opium in small quantities, but having a strychninelike rather than a narcotic effect.
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Origin of thebaine

1890–95; < New Latin thēba(ia) opium of Thebes, Egypt (alteration of Latin Thēbaea, feminine of Thēbaeus Theban) + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for thebaine

thebaine

noun
  1. a poisonous white crystalline alkaloid, found in opium but without opioid actions. Formula: C 19 H 21 NO 3Also called: paramorphine
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Word Origin

C19: from New Latin thebaia opium of Thebes (with reference to Egypt as a chief source of opium) + -ine ²
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

thebaine in Medicine

thebaine

(thēbə-ēn′, thĭ-bāĭn)
n.
  1. A poisonous crystalline alkaloid obtained from opium.paramorphine
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.