"uzglavak" meaning in Serbo-Croatian

{
  "forms": [
    {
      "form": "ùzglāvak",
      "tags": [
        "canonical",
        "neuter"
      ]
    },
    {
      "form": "у̀згла̄вак",
      "tags": [
        "Cyrillic"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "g": "n",
        "head": "ùzglāvak"
      },
      "expansion": "ùzglāvak n (Cyrillic spelling у̀згла̄вак)",
      "name": "sh-noun"
    }
  ],
  "lang": "Serbo-Croatian",
  "lang_code": "sh",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Serbo-Croatian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "sh",
          "name": "Bedding",
          "orig": "sh:Bedding",
          "parents": [
            "Home",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of uzglavlje"
      ],
      "id": "en-uzglavak-sh-noun-r~xHB5eU",
      "links": [
        [
          "uzglavlje",
          "uzglavlje#Serbo-Croatian"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "uzglavlje"
        }
      ]
    }
  ],
  "word": "uzglavak"
}

{
  "forms": [
    {
      "form": "ùzglāvak",
      "tags": [
        "canonical",
        "neuter"
      ]
    },
    {
      "form": "у̀згла̄вак",
      "tags": [
        "Cyrillic"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "g": "n",
        "head": "ùzglāvak"
      },
      "expansion": "ùzglāvak n (Cyrillic spelling у̀згла̄вак)",
      "name": "sh-noun"
    }
  ],
  "lang": "Serbo-Croatian",
  "lang_code": "sh",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Serbo-Croatian entries with incorrect language header",
        "Serbo-Croatian lemmas",
        "Serbo-Croatian neuter nouns",
        "Serbo-Croatian nouns",
        "sh:Bedding"
      ],
      "glosses": [
        "Synonym of uzglavlje"
      ],
      "links": [
        [
          "uzglavlje",
          "uzglavlje#Serbo-Croatian"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "uzglavlje"
        }
      ]
    }
  ],
  "word": "uzglavak"
}