Source : Webster's Revised Unabridged Dictionary (1913)

Rhino \Rhi*no\, n. [Etymol. uncertain.]
   Gold and silver, or money. [Cant] --W. Wagstaffe.

         As long as the rhino lasted.             --Marryat.

Source : WordNet®

rhino
     n : massive powerful herbivorous odd-toed ungulate of southeast
         Asia and Africa having very thick skin and one or two
         horns on the snout [syn: {rhinoceros}]