sul·fo·ni·um | \ ˌsəl-ˈfō-nē-əm 
\
\Definition of sulfonium
: a monovalent group or cation SH3 or derivative SR3
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sulfonium
nounsul·fo·ni·um
variants:
or chiefly British sulphonium \ ˌsəl-ˈfō-nē-əm \
\Medical Definition of sulfonium
: a monovalent group or cation SH3 or derivative SR3
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Time Traveler for sulfonium
The first known use of sulfonium was in 1885
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