sulphate

from WordNet (r) 3.0 (2006)

sulphate
    n 1: a salt or ester of sulphuric acid [syn: {sulfate},
         {sulphate}]

from The Collaborative International Dictionary of English v.0.48

Sulphate \Sul"phate\, n. [NL. sulphas, sulphatis, fr. L.
   sulphur, sulfur, brimstone, sulphur: cf. F. sulfate.] (Chem.)
   A salt of sulphuric acid.
   [1913 Webster]