Enucleated

Five enucleated fragments were cut from the egg immediately after they were released and kept for an hour in the sterilized water;

Source: wiktionary

For the nuclear transfer of somatic cells in farm animals, donor cells are fused with enucleated oocytes by eletric stimulation.

Source: wiktionary

When nuclei of medaka adult somatic cells were used as donors for transfer into enucleated recipient eggs, successful development of transplant embryos was markedly reduced (unpublished data); however, fertile, diploid NTs had been produced in previous studies in which embryonic cell nuclei were transferred into enucleated eggs.

Source: wiktionary