"三畳紀" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語_英語由来",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "英語Triassicの翻訳。"
  ],
  "forms": [
    {
      "form": "さんじょうき"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "日本語 地球科学",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "中生代の最初の紀。2億5190万年前から2億140万年前まで。"
      ],
      "id": "ja-三畳紀-ja-noun-KVd0bCaH",
      "raw_tags": [
        "地球科学"
      ]
    }
  ],
  "word": "三畳紀"
}

{
  "categories": [
    "日本語",
    "日本語 名詞",
    "日本語_英語由来"
  ],
  "etymology_texts": [
    "英語Triassicの翻訳。"
  ],
  "forms": [
    {
      "form": "さんじょうき"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "categories": [
        "日本語 地球科学"
      ],
      "glosses": [
        "中生代の最初の紀。2億5190万年前から2億140万年前まで。"
      ],
      "raw_tags": [
        "地球科学"
      ]
    }
  ],
  "word": "三畳紀"
}