"新始生代" meaning in Japanese

{
  "forms": [
    {
      "form": "新始生代",
      "ruby": [
        [
          "新",
          "しん"
        ],
        [
          "始",
          "し"
        ],
        [
          "生",
          "せい"
        ],
        [
          "代",
          "だい"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "Shinshiseidai",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "proper",
        "2": "しんしせいだい"
      },
      "expansion": "新(しん)始(し)生(せい)代(だい) • (Shinshiseidai)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "name",
  "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 suffixed with 代",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 4 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "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": "Geology",
          "orig": "ja:Geology",
          "parents": [
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Time",
          "orig": "ja:Time",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "the Neoarchean eon"
      ],
      "id": "en-新始生代-ja-name-IvSwtFpF",
      "links": [
        [
          "Neoarchean",
          "Neoarchean"
        ],
        [
          "eon",
          "eon"
        ]
      ],
      "related": [
        {
          "roman": "Shiseidai",
          "ruby": [
            [
              "始",
              "し"
            ],
            [
              "生",
              "せい"
            ],
            [
              "代",
              "だい"
            ]
          ],
          "word": "始生代"
        },
        {
          "roman": "Chūshiseidai",
          "ruby": [
            [
              "中",
              "ちゅう"
            ],
            [
              "始",
              "し"
            ],
            [
              "生",
              "せい"
            ],
            [
              "代",
              "だい"
            ]
          ],
          "word": "中始生代"
        }
      ]
    }
  ],
  "word": "新始生代"
}

{
  "forms": [
    {
      "form": "新始生代",
      "ruby": [
        [
          "新",
          "しん"
        ],
        [
          "始",
          "し"
        ],
        [
          "生",
          "せい"
        ],
        [
          "代",
          "だい"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "Shinshiseidai",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "proper",
        "2": "しんしせいだい"
      },
      "expansion": "新(しん)始(し)生(せい)代(だい) • (Shinshiseidai)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "name",
  "related": [
    {
      "roman": "Shiseidai",
      "ruby": [
        [
          "始",
          "し"
        ],
        [
          "生",
          "せい"
        ],
        [
          "代",
          "だい"
        ]
      ],
      "word": "始生代"
    },
    {
      "roman": "Chūshiseidai",
      "ruby": [
        [
          "中",
          "ちゅう"
        ],
        [
          "始",
          "し"
        ],
        [
          "生",
          "せい"
        ],
        [
          "代",
          "だい"
        ]
      ],
      "word": "中始生代"
    }
  ],
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese proper nouns",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms spelled with third grade kanji",
        "Japanese terms suffixed with 代",
        "Japanese terms with 4 kanji",
        "Japanese terms with redundant sortkeys",
        "Pages with 1 entry",
        "Pages with entries",
        "ja:Geology",
        "ja:Time"
      ],
      "glosses": [
        "the Neoarchean eon"
      ],
      "links": [
        [
          "Neoarchean",
          "Neoarchean"
        ],
        [
          "eon",
          "eon"
        ]
      ]
    }
  ],
  "word": "新始生代"
}

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