Sulphonium

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Sulphonium \Sul*pho"ni*um\, n. [Sulphur + ammonium.] (Chem.)
     A hypothetical radical, {SH3}, regarded as the type and
     nucleus of the sulphines.
     [1913 Webster]