decamethonium

noun

deca·​me·​tho·​ni·​um ˌde-kə-mə-ˈthō-nē-əm 

: a synthetic ion used in the form of either its bromide or iodide salts (C₁₆H₃₈Br₂N₂ or C₁₆H₃₈I₂N₂) as a skeletal muscle relaxant

also : either of these salts

Word History

Etymology

deca- + methylene + -onium

First Known Use

circa 1949, in the meaning defined above

Medical Definition

decamethonium

noun

deca·​me·​tho·​ni·​um ˌdek-ə-mə-ˈthō-nē-əm 

: a synthetic ion used especially in the form of its bromide C₁₆H₃₈Br₂N₂ or iodide C₁₆H₃₈I₂N₂ as a skeletal muscle relaxant