metroptosis, descensus uteri 1. The prolapse of the uterus. 2. The downward displacement of the uterus so that the cervix is within the vaginal orifice (first-degree prolapse), the cervix is outside the orifice (second-degree prolapse), or the entire uterus is outside the orifice (third-degree prolapse). Found on http://www.wordinfo.info/words/index/info/view_unit/1785/