Source : Webster's Revised Unabridged Dictionary (1913)

Rhenish \Rhen"ish\, a. [L. Rhenus the Rhine. ]
   Of or pertaining to the river Rhine; as, Rhenish wine. -- n.
   Rhine wine.

Source : WordNet®

Rhenish
     adj : of or relating to the Rhine River and the lands adjacent to
           it; "Rhenish wines tend to be sweet"
     n : any of several white wines from the Rhine River valley in
         Germany (`hock' is British usage) [syn: {Rhine wine}, {hock}]