"nonagono" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "nona",
        "3": "gono"
      },
      "expansion": "nona- + -gono",
      "name": "confix"
    }
  ],
  "etymology_text": "From nona- + -gono.",
  "forms": [
    {
      "form": "nonagoni",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "nonagono m (plural nonagoni)",
      "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": "Italian terms prefixed with nona-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Italian terms suffixed with -gono",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of ennagono"
      ],
      "id": "en-nonagono-it-noun-zX3dLkmt",
      "links": [
        [
          "ennagono",
          "ennagono#Italian"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "ennagono"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "nonagono"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "nona",
        "3": "gono"
      },
      "expansion": "nona- + -gono",
      "name": "confix"
    }
  ],
  "etymology_text": "From nona- + -gono.",
  "forms": [
    {
      "form": "nonagoni",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "nonagono m (plural nonagoni)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian nouns",
        "Italian terms prefixed with nona-",
        "Italian terms suffixed with -gono"
      ],
      "glosses": [
        "Synonym of ennagono"
      ],
      "links": [
        [
          "ennagono",
          "ennagono#Italian"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "ennagono"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "nonagono"
}