Definition of saviour sibling noun from the Oxford Advanced Learner's Dictionary


saviour sibling

(also savior sibling) noun
BrE BrE//ˈseɪvjə sɪblɪŋ//
; NAmE NAmE//ˈseɪvjər sɪblɪŋ//
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a child who is born through IVF in order to ensure that they have organs or cells that can be used to treat an older brother or sister with a serious medical condition