Noun
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(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"
Verb
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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"