Uplift

More specifically called biological uplift, uplift is the act of an advanced civilization helping the development of another species. The xel'naga used this process in an effort to stave off their own extinction by uplifting the protoss and the zerg, but their plans went awry.

The attempted production of a hybrid between protoss and zerg by Samir Duran may be considered a form of uplift, but much different than the method used by the xel'naga which took millennia.