The Collaborative International Dictionary of English v.0.48:

Retrovert \Re"tro*vert\, v. t. [imp. & p. p. Retroverted; p.
   pr. & vb. n. Retroverting.] [Pref. retro- + L. vertere,
   versum, to turn. Cf. Retrorse.]
   To turn back.
   [1913 Webster]

WordNet (r) 3.0 (2006):

retrovert
    v 1: go back to a previous state; "We reverted to the old rules"
         [syn: revert, return, retrovert, regress, turn
         back]