A basic sulfate; a sulfate that contains some base unneutralised and still capable of combining with the acid. ... (05 Mar 2000) ... 
Type: Term Pronunciation: sŭb-sŭl′fāt Definitions: 1. A basic sulfate; a sulfate that contains some base that is unneutralized and still capable of combining with the acid.
a basic salt of sulfuric acid.