Source : Webster's Revised Unabridged Dictionary (1913)

Faun \Faun\, n. [L. Faunus, fr. favere to be favorable. See
   {Favor}.] (Rom. Myth.)
   A god of fields and shipherds, diddering little from the
   satyr. The fauns are usually represented as half goat and
   half man.

         Satyr or Faun, or Sylvan.                --Milton.

Source : WordNet®

faun
     n : ancient Italian deity in human shape, with horns, pointed
         ears and a goat's tail; equivalent to Greek satyr