saviour sibling
noun/ˈseɪvjə sɪblɪŋ/
/ˈseɪvjər sɪblɪŋ/
(also savior sibling)
- 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
Check pronunciation:
saviour sibling