Incorrect. Dromedary and bactrian camels can reproduce. Lions and tigers can, comically, do the same. Donkeys and zebras can as well. The point is that the standard is it makes a VIABLE offspring. An offspring that can itself reproduce. So interspecies or intergeneric whatever. The point is that it makes an offspring that isn't sterile as ****.
note that those species with, shall we say, more flexible genomes....can do some crazy stuff.