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The Collaborative International Dictionary
Mydaleine

Mydaleine \My*da"le*ine\, n. [Gr. myda^n to be clammy (from decay).] (Physiol. Chem.) A toxic alkaloid (ptomaine) obtained from putrid flesh and from herring brines. As a poison it is said to execute profuse diarrhoea, vomiting, and intestinal inflammation.
--Brieger.