"figlia unica" meaning in Italian

{
  "forms": [
    {
      "form": "figlie uniche",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "figlia unica f (plural figlie uniche)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "it",
          "name": "Female family members",
          "orig": "it:Female family members",
          "parents": [
            "Family members",
            "Female people",
            "Family",
            "Female",
            "People",
            "Gender",
            "Human",
            "Biology",
            "Psychology",
            "Sociology",
            "All topics",
            "Sciences",
            "Social sciences",
            "Fundamental",
            "Society"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "My cousin is an only child.",
          "text": "Mia cugina è figlia unica.",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "word": "figlio unico"
        }
      ],
      "glosses": [
        "female equivalent of figlio unico"
      ],
      "id": "en-figlia_unica-it-noun-g8rRm2Rt",
      "links": [
        [
          "figlio unico",
          "figlio unico#Italian"
        ]
      ],
      "tags": [
        "feminine",
        "form-of"
      ]
    }
  ],
  "word": "figlia unica"
}

{
  "forms": [
    {
      "form": "figlie uniche",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "figlia unica f (plural figlie uniche)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian female equivalent nouns",
        "Italian feminine nouns",
        "Italian lemmas",
        "Italian multiword terms",
        "Italian nouns",
        "Italian terms with usage examples",
        "Pages with 1 entry",
        "it:Female family members"
      ],
      "examples": [
        {
          "english": "My cousin is an only child.",
          "text": "Mia cugina è figlia unica.",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "word": "figlio unico"
        }
      ],
      "glosses": [
        "female equivalent of figlio unico"
      ],
      "links": [
        [
          "figlio unico",
          "figlio unico#Italian"
        ]
      ],
      "tags": [
        "feminine",
        "form-of"
      ]
    }
  ],
  "word": "figlia unica"
}