sulfonyl
noun
sul·fo·nyl ˈsəl-fə-ˌnil 
: the divalent group SO2
Word History
First Known Use
1920, in the meaning defined above
Medical Definition
sulfonyl
noun
sul·fo·nyl
variants or chiefly British sulphonyl
ˈsəl-fə-ˌnil
: the bivalent group SO2
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