| 释义 | tetraethylammonium \| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ ̷ ̷\ noun
 Etymology: tetraethyl + ammonium
 : the 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)
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