what is a savior sibling
saviour siblingnoun [ C ] UK US savior sibling uk â /ËseÉª.vjÉ ËsÉªb.lÉªÅ/ us â /ËseÉª.vjÉ ËsÉªb.lÉªÅ/. âº a child who is born with particular genes that have been chosen in order to treat an older brother or sister who has a disease. Thesaurus: synonyms and related words. Genetics.