"saviour sibling" meaning in English

{
  "forms": [
    {
      "form": "saviour siblings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "saviour sibling (plural saviour siblings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
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          "parents": [],
          "source": "w"
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          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Spanish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Family",
          "orig": "en:Family",
          "parents": [
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2008 May 20, Nicholas Watt, The Guardian:",
          "text": "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.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A child, conceived by selected IVF treatment, so as to have compatible tissue that could be used to treat an existing sick sibling"
      ],
      "id": "en-saviour_sibling-en-noun-Rn8kb0QN",
      "links": [
        [
          "child",
          "child"
        ],
        [
          "IVF",
          "IVF"
        ],
        [
          "tissue",
          "tissue"
        ],
        [
          "sibling",
          "sibling"
        ]
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "child with compatible tissue to treat a sick sibling",
          "tags": [
            "masculine"
          ],
          "word": "bébé-médicament"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "child with compatible tissue to treat a sick sibling",
          "tags": [
            "masculine"
          ],
          "word": "bébé médicament"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "child with compatible tissue to treat a sick sibling",
          "tags": [
            "masculine"
          ],
          "word": "bebé medicamento"
        }
      ]
    }
  ],
  "word": "saviour sibling"
}

{
  "forms": [
    {
      "form": "saviour siblings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "saviour sibling (plural saviour siblings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with French translations",
        "Terms with Spanish translations",
        "en:Family"
      ],
      "examples": [
        {
          "ref": "2008 May 20, Nicholas Watt, The Guardian:",
          "text": "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.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A child, conceived by selected IVF treatment, so as to have compatible tissue that could be used to treat an existing sick sibling"
      ],
      "links": [
        [
          "child",
          "child"
        ],
        [
          "IVF",
          "IVF"
        ],
        [
          "tissue",
          "tissue"
        ],
        [
          "sibling",
          "sibling"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "child with compatible tissue to treat a sick sibling",
      "tags": [
        "masculine"
      ],
      "word": "bébé-médicament"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "child with compatible tissue to treat a sick sibling",
      "tags": [
        "masculine"
      ],
      "word": "bébé médicament"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "child with compatible tissue to treat a sick sibling",
      "tags": [
        "masculine"
      ],
      "word": "bebé medicamento"
    }
  ],
  "word": "saviour sibling"
}