"нуца" meaning in Sirenik

{
  "forms": [
    {
      "form": "nuca",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ysr",
        "2": "noun",
        "head": "",
        "tr": ""
      },
      "expansion": "нуца (nuca)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "нуца (nuca)",
      "name": "ysr-noun"
    }
  ],
  "lang": "Sirenik",
  "lang_code": "ysr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Sirenik entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "elder brother"
      ],
      "id": "en-нуца-ysr-noun-lZ8Tks1L"
    }
  ],
  "word": "нуца"
}

{
  "forms": [
    {
      "form": "nuca",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ysr",
        "2": "noun",
        "head": "",
        "tr": ""
      },
      "expansion": "нуца (nuca)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "нуца (nuca)",
      "name": "ysr-noun"
    }
  ],
  "lang": "Sirenik",
  "lang_code": "ysr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 2 entries",
        "Sirenik entries with incorrect language header",
        "Sirenik lemmas",
        "Sirenik nouns"
      ],
      "glosses": [
        "elder brother"
      ]
    }
  ],
  "word": "нуца"
}