"十二角形" meaning in Japanese

{
  "forms": [
    {
      "form": "十二角形",
      "head_nr": 1,
      "ruby": [
        [
          "十",
          "じゅう"
        ],
        [
          "二",
          "に"
        ],
        [
          "角",
          "かく"
        ],
        [
          "形",
          "けい"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "jūnikakukei",
      "head_nr": 1,
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "じゅうにかっけい",
      "head_nr": 2,
      "tags": [
        "alternative",
        "hiragana"
      ]
    },
    {
      "form": "jūnikakkei",
      "head_nr": 2,
      "tags": [
        "Rōmaji",
        "alternative",
        "hiragana"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "じゅうにかくけい"
      },
      "expansion": "十(じゅう)二(に)角(かく)形(けい) • (jūnikakukei)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 4 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese words with multiple readings",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Polygons",
          "orig": "ja:Polygons",
          "parents": [
            "Shapes",
            "Geometry",
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Twelve",
          "orig": "ja:Twelve",
          "parents": [
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a dodecagon"
      ],
      "head_nr": 2,
      "id": "en-十二角形-ja-noun-gc6xFP6v",
      "links": [
        [
          "dodecagon",
          "dodecagon"
        ]
      ],
      "wikipedia": [
        "ja:十二角形"
      ]
    }
  ],
  "word": "十二角形"
}

{
  "forms": [
    {
      "form": "十二角形",
      "head_nr": 1,
      "ruby": [
        [
          "十",
          "じゅう"
        ],
        [
          "二",
          "に"
        ],
        [
          "角",
          "かく"
        ],
        [
          "形",
          "けい"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "jūnikakukei",
      "head_nr": 1,
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "じゅうにかっけい",
      "head_nr": 2,
      "tags": [
        "alternative",
        "hiragana"
      ]
    },
    {
      "form": "jūnikakkei",
      "head_nr": 2,
      "tags": [
        "Rōmaji",
        "alternative",
        "hiragana"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "じゅうにかくけい"
      },
      "expansion": "十(じゅう)二(に)角(かく)形(けい) • (jūnikakukei)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms with 4 kanji",
        "Japanese terms with non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Japanese words with multiple readings",
        "Pages with 1 entry",
        "Pages with entries",
        "ja:Polygons",
        "ja:Twelve"
      ],
      "glosses": [
        "a dodecagon"
      ],
      "head_nr": 2,
      "links": [
        [
          "dodecagon",
          "dodecagon"
        ]
      ],
      "wikipedia": [
        "ja:十二角形"
      ]
    }
  ],
  "word": "十二角形"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "十二角形"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "十二角形",
  "trace": ""
}