Myd`a·tox'in noun [ Greek myda^n to be clammy (from decay) + tox ic + in .] (Physiol. Chem.) A poisonous amido acid, C 6 H 13 NO 2 , separated by Brieger from decaying horseflesh. In physiological action, it is similar to curare. Found on http://www.encyclo.co.uk/webster/M/122