Heterotopism /(?)/

Het·er·ot·o·pism

Heterotopism

n.
  1. A deviation from the natural position; -- a term applied in the case of organs or growths which are abnormal in situation. (Med.)
  2. A deviation from the natural position of parts, supposed to be effected in thousands of years, by the gradual displacement of germ cells. (Biol.)