The Collaborative International Dictionary of English v.0.48:
Interbreed \In`ter*breed"\, v. t. & i. To breed by crossing different stocks of animals or plants. [1913 Webster]WordNet (r) 3.0 (2006):
interbreed v 1: breed animals or plants using parents of different races and varieties; "cross a horse and a donkey"; "Mendel tried crossbreeding"; "these species do not interbreed" [syn: crossbreed, cross, hybridize, hybridise, interbreed]