tetraethylammonium

noun
tet·​ra·​eth·​yl·​am·​mo·​ni·​um | \ˌte-trə-ˌeth-əl-ə-ˈmō-nē-əm \

Medical Definition of tetraethylammonium 

: a quaternary ammonium ion (C2H5)4N+ containing four ethyl groups also : a salt of this ion (as the deliquescent crystalline chloride used as a ganglionic blocking agent) abbreviation TEA

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