Superphosphate

1 definition found

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

  Superphosphate \Su`per*phos"phate\, n. (Chem.)
     An acid phosphate.
     [1913 Webster]
  
     {Superphosphate of lime} (Com. Chem.), a fertilizer obtained
        by trating bone dust, bone black, or phosphorite with


        sulphuric acid, whereby the insoluble neutral calcium
        phosphate, {Ca3(PO4)2}, is changed to the primary or acid
        calcium phosphate {Ca(H2PO4)2}, which is soluble and
        therefore available for the soil.
        [1913 Webster]