The Collaborative International Dictionary of English v.0.48:

Delph \Delph\, n.
   Delftware.
   [1913 Webster]

         Five nothings in five plates of delph.   --Swift.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Delph \Delph\, n. (Hydraul. Engin.)
   The drain on the land side of a sea embankment. --Knight.
   [1913 Webster]