Medical Dictionary
methonium
noun me·tho·ni·um \mə-ˈthō-nē-əm\
Medical Definition of METHONIUM
: any of several bivalent doubled substituted ammonium ions (as decamethonium or hexamethonium) in which the two quaternary nitrogen atoms are separated by a polymethylene chain <methonium salts used in the treatment of hypertension>
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