Source : Webster's Revised Unabridged Dictionary (1913)

Retroversion \Re`tro*ver"sion\, n. [Cf. F. r['e]troversion. See
   {Retrovert}.]
   A turning or bending backward; also, the state of being
   turned or bent backward; displacement backwards; as,
   retroversion of the uterus.

   Note: In retroversion the bending is gradual or curved; in
         retroflexion it is abrupt or angular.

Source : WordNet®

retroversion
     n 1: a turning or tilting backward of an organ or body part;
          "retroversion of the uterus" [syn: {retroflection}, {retroflexion}]
     2: translation back into the original language; "the teacher
        translated Latin texts into English which he gave to his
        students for retroversion"
     3: returning to a former state [syn: {regression}, {regress}, {reversion},
         {retrogression}]