outbreeding

/AW1 T B R IY1 D IH0 NG/
noun
  1. 1

    The breeding of unrelated (or only distantly related) individuals.

    โ€œOutbreeding is a positive thing, because of the wider gene pool.โ€

  2. 2

    The mating of people from different groups (especially as a result of social proscription).

Source: https://en.wiktionary.org/wiki/outbreeding