单词	phosphonium
释义	phosphonium noun phos·​pho·​ni·​um fäs-ˈfō-nē-əm  : a monovalent cation PH4+ analogous to ammonium and derived from phosphine also : an organic derivative of phosphonium (such as (C2H5)4P+) Word History Etymology New Latin First Known Use 1859, in the meaning defined above Medical Definition phosphonium noun phos·​pho·​ni·​um fäs-ˈfō-nē-əm  : a monovalent cation PH4+ analogous to ammonium and derived from phosphine also : an organic derivative of phosphonium (as (C2H5)4P+)
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