"fullsib" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "full",
        "3": "sib"
      },
      "expansion": "full + sib",
      "name": "compound"
    }
  ],
  "etymology_text": "full + sib",
  "forms": [
    {
      "form": "fullsibs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fullsib (plural fullsibs)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "2012, In the Light of Evolution: Volume V: Cooperation and Conflict, National Academy of Sciences",
          "text": "For example, fullsibs, considered as a genealogical category, are symmetrically related to ego. However, “fullsibs,” considered as an innate category, are ego's matrikin because of the possibility of undetected cuckoldry.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A full sibling."
      ],
      "id": "en-fullsib-en-noun-4vr7fXKu",
      "links": [
        [
          "full sibling",
          "full sibling"
        ]
      ]
    }
  ],
  "word": "fullsib"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "full",
        "3": "sib"
      },
      "expansion": "full + sib",
      "name": "compound"
    }
  ],
  "etymology_text": "full + sib",
  "forms": [
    {
      "form": "fullsibs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fullsib (plural fullsibs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2012, In the Light of Evolution: Volume V: Cooperation and Conflict, National Academy of Sciences",
          "text": "For example, fullsibs, considered as a genealogical category, are symmetrically related to ego. However, “fullsibs,” considered as an innate category, are ego's matrikin because of the possibility of undetected cuckoldry.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A full sibling."
      ],
      "links": [
        [
          "full sibling",
          "full sibling"
        ]
      ]
    }
  ],
  "word": "fullsib"
}