hybrid embryo

plural hybrid embryos

1. An embryo resulting from the sperm of one species fertilising the egg of another.

   True hybrid embryos are the result of fertilising an egg with the sperm of another closely related species; for example, a mule is the hybrid offspring of a donkey and a horse.

   2008 May 19, David Batty, The Guardian

2. Specifically, an embryo created artificially which combines human and animal DNA, in various proportions, for the purposes of medical research.

   MPs pushed back the boundaries of science last night when they voted to allow the creation of hybrid embryos, which have a combination of human and animal DNA, as well as "saviour siblings" to save sick children.

   2008 May 20, Nicholas Watt, The Guardian