intermigration

Noun

1. reciprocal migration; interchange of dwelling place by migration
   • point of Access and mutual Intercourſe and possibility of Intermigrations - a. 1677 (date written), Matthew Hale, The Primitive Origination of Mankind, Considered and Examined According to the Light of Nature, London:...
   • […]the mountain ranges blocked intermigrations. The Himalayas blocked exchanges between north and south. Finally, with the advent of desert conditions in Arabia and Baluchistan, there was again almost no interchange...