Answer (three definitions, where two are biology and one is geology):
1) (biology) Of or pertaining to polygenesis; polyphyletic.
2) relating to or determined by polygenes.
If you don’t know what a polygene is: A polygene or multiple gene inheritance is a member of a group of non-epistatic genes that interact additively to influence a phenotypic trait.
3) (geology) One which is composite, or consists of two or more monogenetic ranges, each having had its own history of development.
Hope this helps! :)
