verb (used with object), cross·bred, cross·breed·ing.
verb (used without object), cross·bred, cross·breed·ing.
Examples from the Web for cross-breeding
It soon became acclimatized, and its cross-breeding with the ass led for centuries to the production of magnificent mules.
These are merged by cross-breeding into the original type, which, therefore, remains unchanged.Evolution|Joseph Le Conte
She recalled something Colonel Belmont had once said about "cross-breeding being death on beauty in nine cases out of ten."The Californians|Gertrude Franklin Horn Atherton
But the product of a hundred years of cross-breeding was a splendid type of citizenship.The Old Northwest|Frederic Austin Ogg
The cause of that lies very likely in the nutrition of the young fry, and perhaps, also, partly in cross-breeding.Schenk's Theory: The Determination of Sex|Samuel Leopold Schenk