interbreeding

(noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids. Synonyms: hybridization, hybridisation, crossbreeding, crossing, cross, hybridizing.

(noun) reproduction by parents of different races (especially by white and non-white persons). Synonyms: miscegenation, crossbreeding.

(verb) breed animals or plants using parents of different races and varieties. Synonyms: crossbreed, cross, hybridize, hybridise, interbreed. Examples: "Cross a horse and a donkey." "Mendel tried crossbreeding." "These species do not interbreed."