"骨化" meaning in Japanese

{
  "forms": [
    {
      "form": "骨化",
      "ruby": [
        [
          "骨",
          "こっ"
        ],
        [
          "化",
          "か"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kokka",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "kotukwa",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "こつくわ",
      "roman": "kotukwa",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "こっか",
        "hhira": "こつくわ"
      },
      "expansion": "骨(こっ)化(か) • (kokka) ^(←こつくわ (kotukwa)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 2 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "ja",
          "name": "Biology",
          "orig": "ja:Biology",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "ossification"
      ],
      "id": "en-骨化-ja-noun-CetIa-XB",
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "ossification",
          "ossification"
        ]
      ],
      "raw_glosses": [
        "(biology) ossification"
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ],
      "wikipedia": [
        "ja:骨化"
      ]
    }
  ],
  "sounds": [
    {
      "other": "こっか"
    },
    {
      "ipa": "[ko̞k̚ka̠]"
    }
  ],
  "word": "骨化"
}

{
  "forms": [
    {
      "form": "骨化",
      "ruby": [
        [
          "骨",
          "こっ"
        ],
        [
          "化",
          "か"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kokka",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "kotukwa",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "こつくわ",
      "roman": "kotukwa",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "こっか",
        "hhira": "こつくわ"
      },
      "expansion": "骨(こっ)化(か) • (kokka) ^(←こつくわ (kotukwa)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms historically spelled with わ",
        "Japanese terms spelled with sixth grade kanji",
        "Japanese terms spelled with third grade kanji",
        "Japanese terms with 2 kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with redundant sortkeys",
        "Pages with 2 entries",
        "Pages with entries",
        "ja:Biology"
      ],
      "glosses": [
        "ossification"
      ],
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "ossification",
          "ossification"
        ]
      ],
      "raw_glosses": [
        "(biology) ossification"
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ],
      "wikipedia": [
        "ja:骨化"
      ]
    }
  ],
  "sounds": [
    {
      "other": "こっか"
    },
    {
      "ipa": "[ko̞k̚ka̠]"
    }
  ],
  "word": "骨化"
}

{
  "called_from": "parser/304",
  "msg": "HTML tag <span> not properly closed",
  "path": [
    "骨化"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "骨化",
  "trace": "started on line 2, detected on line 2"
}

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