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WordNet (r) 3.0 (2006) (WordNet)

retroversion
n 1: a turning or tilting backward of an organ or body part;
"retroversion of the uterus" [synonym: {retroversion},
{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 [synonym: {regression}, {regress},
{reversion}, {retrogression}, {retroversion}]