"девятиугольник" meaning in ロシア語

{
  "categories": [
    {
      "kind": "other",
      "name": "ロシア語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "ロシア語 6音節語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "ロシア語 名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "ロシア語 国際音声記号あり",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "ロシア語 接中辞\"-и-\"",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "ロシア語 接尾辞\"-ник\"",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "ロシア語 複合語",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "де́вять (dévjatʹ) + -и- (-i-) + у́гол (úgol) + -ник (-nik)"
  ],
  "forms": [
    {
      "form": "девятиуго́льник",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "devjatiugólʹnik"
    }
  ],
  "lang": "ロシア語",
  "lang_code": "ru",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "ロシア語 図形",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "九角形。"
      ],
      "id": "ja-девятиугольник-ru-noun-mk5YIq9A",
      "raw_tags": [
        "図形"
      ]
    }
  ],
  "word": "девятиугольник"
}

{
  "categories": [
    "ロシア語",
    "ロシア語 6音節語",
    "ロシア語 名詞",
    "ロシア語 国際音声記号あり",
    "ロシア語 接中辞\"-и-\"",
    "ロシア語 接尾辞\"-ник\"",
    "ロシア語 複合語"
  ],
  "etymology_texts": [
    "де́вять (dévjatʹ) + -и- (-i-) + у́гол (úgol) + -ник (-nik)"
  ],
  "forms": [
    {
      "form": "девятиуго́льник",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "devjatiugólʹnik"
    }
  ],
  "lang": "ロシア語",
  "lang_code": "ru",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "categories": [
        "ロシア語 図形"
      ],
      "glosses": [
        "九角形。"
      ],
      "raw_tags": [
        "図形"
      ]
    }
  ],
  "word": "девятиугольник"
}