資料來源 : Webster's Revised Unabridged Dictionary (1913)

Rhein \Rhe"in\, n. (Chem.)
   Chrysophanic acid.

資料來源 : WordNet®

Rhein
     n : a major European river carrying more traffic than any other
         river in the world; flows into the North Sea [syn: {Rhine},
          {Rhine River}]