metacyesis 1. A pregnancy resulting from gestation elsewhere than in the uterus: ectopic pregnancy, extrauterine pregnancy, ectopic gestation, extrauterine gestation. 2. A gestation elsewhere than in the uterus. Often occurring in the fallopian tube; resulting in abdominal pain, fainting, and/or vaginal bleeding. Found on http://www.wordinfo.info/words/index/info/view_unit/1300/3