retroflexion
noun
ret·ro·flex·ion ˌre-trə-ˈflek-shən 
variants or retroflection
1
: the state of being bent back
especially : the bending back of an organ (such as a uterus) upon itself
2
: the act or process of bending back
3
: retroflex articulation
Word History
First Known Use
1782, in the meaning defined at sense 1
Medical Definition
retroflexion
noun
ret·ro·flex·ion ˌre-trə-ˈflek-shən
: the state of being bent back
specifically : the bending back of the body of the uterus upon the cervix compare retroversion