Re`tro*ver"sion (?), n. [Cf. F. r'etroversion. See Retrovert.]
A turning or bending backward; also, the state of being turned or bent backward; displacement backwards; as, retroversion of the uterus.
⇒ In retroversion the bending is gradual or curved; in retroflexion it is abrupt or angular.
© Webster 1913.