1580s, "a tilting or turning backward," noun of action or state from Latin retroversus "turned or bent backwards," from retro (see retro-) + versus "turned" (see versus).
retroversion ret·ro·ver·sion (rět'rō-vûr'zhən, -shən)n.
A turning or tilting backward, as of the uterus.
The state of being turned or tilted back.
A condition in which the teeth are located in a position posterior to normal.