benzpyrinium

== English == === Etymology === From benz(yl)pyr(id)ine +‎ -ium (“quaternary ammonium compound”). === Noun === benzpyrinium (uncountable) (pharmacology) The pyridinium cation 1-benzylpyridin-1-ium-3-yl N,N-dimethylcarbamate, the bromide of which is used to relieve postoperative urinary retention.