'interbreeding' definitions:

Definition of 'interbreeding'

(from WordNet)
noun
(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids [syn: hybridization, hybridisation, crossbreeding, crossing, cross, interbreeding, hybridizing]
noun
Reproduction by parents of different races (especially by white and non-white persons) [syn: miscegenation, crossbreeding, interbreeding]