Source : Webster's Revised Unabridged Dictionary (1913)

Hypallage \Hy*pal"la*ge\, n. [L., fr. Gr. ?, prop., interchange,
   exchange, fr, ? to interchange; ? under + ? to change.]
   (Gram.)
   A figure consisting of a transference of attributes from
   their proper subjects to other. Thus Virgil says, ``dare
   classibus austros,'' to give the winds to the fleets, instead
   of dare classibus austris, to give the fleets to the winds.

         The hypallage, of which Virgil is fonder than any other
         writer, is much the gravest fault in language.
                                                  --Landor.

Source : WordNet®

hypallage
     n : reversal of the syntactic relation of two words (as in `her
         beauty's face')