From The Collaborative International Dictionary of English v.0.48 :
Anastrophe \A*nas"tro*phe\, n. [Gr. ?, fr. ? to turn up or back;
'ana` + ? to turn.] (Rhet. & Gram.)
An inversion of the natural order of words; as, echoed the
hills, for, the hills echoed.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
anastrophe
n 1: the reversal of the normal order of words [syn:
anastrophe, inversion]