The Collaborative International Dictionary
Intermigration
Intermigration \In`ter*mi*gra"tion\, n.
Reciprocal migration; interchange of dwelling place by
migration. [R.]
--Sir M. Hale.
Wiktionary
intermigration
n. reciprocal migration; interchange of dwelling place by migration
Usage examples of "intermigration".
And to this continuity of the circumpolar land, and to the consequent freedom for intermigration under a more favourable climate, I attribute the necessary amount of uniformity in the sub-arctic and northern temperate productions of the Old and New Worlds, at a period anterior to the Glacial epoch.