"crossbreed" in the noun sense
1. hybrid, crossbreed, cross
genetics) an organism that is the offspring of genetically dissimilar parents or stock especially offspring produced by breeding plants or animals of different varieties or breeds or species
"a mule is a cross between a horse and a donkey"
"crossbreed" in the verb sense
1. crossbreed, cross, hybridize, hybridise, interbreed
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"
Source: WordNet® (An amazing lexical database of English)
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