
Thebaine (paramorphine), also known as codeine methyl enol ether, is an opiate alkaloid, its name coming from the Greek Θῆβαι, Thēbai, an ancient city in Upper Egypt. A minor constituent of opium, thebaine is chemically similar to both morphine and codeine, but has stimulatory rather than depressant effects. At high doses, it causes convuls...
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http://en.wikipedia.org/wiki/Thebaine

• (n.) A poisonous alkaloid, C19H21NO3, found in opium in small quantities, having a sharp, astringent taste, and a tetanic action resembling that of strychnine.
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http://thinkexist.com/dictionary/meaning/thebaine/

(the-ba´in) a crystalline, poisonous, and anodyne alkaloid from opium, having properties similar to those of strychnine.
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http://www.encyclo.co.uk/local/21001
The·ba'ine noun [ So called from a kind of Egyptian opium produced at
Thebes .]
(Chemistry) A poisonous alkaloid, C
19 H
21 NO
3 , found in opium in small quantities, having a sharp, astringent taste, and a tetanic action resembling that of strychnine.
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http://www.encyclo.co.uk/webster/T/38

Type: Term Pronunciation: thē-bā′ēn, -in Definitions: 1. An alkaloid obtained from opium (0.3-1.5%); it resembles strychnine in its action, causing tetanic convulsions. Synonyms: paramorphine
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http://www.medilexicon.com/medicaldictionary.php?t=91158

Thebaine is a naturally occurring non-addictive, non-narcotic alkaloid contained in opium. It is coloured red by concentrated sulphuric acid and is very poisonous, causing severe convulsions by its action on the spinal cord and generally resembling strychnine in its results. However, it can also be used to produce codeine and other pain killers, an...
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http://www.probertencyclopaedia.com/browse/GT.HTM
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