1.  crossbreeding(n = noun.act) cross, crossing, hybridisation, hybridization, hybridizing, interbreeding - (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids; Array
is a kind of conjugation, coupling, mating, pairing, sexual union, union
has particulars: dihybrid cross, monohybrid cross, reciprocal, reciprocal cross, test-cross, testcross

2.  crossbreeding(n = noun.act) interbreeding, miscegenation - reproduction by parents of different races (especially by white and non-white persons); Array
is a kind of breeding, facts of life, procreation, reproduction