RETROVERSION
regression, regress, reversion, retrogression, retroversion
(noun) returning to a former state
retroversion
(noun) translation back into the original language; “the teacher translated Latin texts into English which he gave to his students for retroversion”
retroversion, retroflection, retroflexion
(noun) a turning or tilting backward of an organ or body part; “retroversion of the uterus”
Source: WordNet® 3.1
Noun
retroversion (countable and uncountable, plural retroversions)
A turning or falling back.
(medicine) The state or condition of being retroverted.
Antonym: anteversion
Source: Wiktionary
Re`tro*ver"sion, n. Etym: [Cf. F. rétroversion. See Retrovert.]
Definition: 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: Webster’s Unabridged Dictionary 1913 Edition