"葉層" meaning in Japanese

{
  "forms": [
    {
      "form": "葉層",
      "ruby": [
        [
          "葉",
          "よう"
        ],
        [
          "層",
          "そう"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "yōsō",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "efusou",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "えふそう",
      "roman": "efusou",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ようそう",
        "hhira": "えふそう"
      },
      "expansion": "葉(よう)層(そう) • (yōsō) ^(←えふそう (efusou)?)",
      "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 alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "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 2 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": "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"
        }
      ],
      "glosses": [
        "lamina (fine layer that occurs in sedimentary rocks)"
      ],
      "id": "en-葉層-ja-noun-zVfMDM27",
      "links": [
        [
          "geology",
          "geology"
        ],
        [
          "lamina",
          "lamina"
        ]
      ],
      "raw_glosses": [
        "(geology) lamina (fine layer that occurs in sedimentary rocks)"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "other": "よーそー"
    },
    {
      "ipa": "[jo̞ːso̞ː]"
    }
  ],
  "word": "葉層"
}

{
  "forms": [
    {
      "form": "葉層",
      "ruby": [
        [
          "葉",
          "よう"
        ],
        [
          "層",
          "そう"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "yōsō",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "efusou",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "えふそう",
      "roman": "efusou",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ようそう",
        "hhira": "えふそう"
      },
      "expansion": "葉(よう)層(そう) • (yōsō) ^(←えふそう (efusou)?)",
      "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 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 non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Pages with 1 entry",
        "Pages with entries",
        "ja:Geology"
      ],
      "glosses": [
        "lamina (fine layer that occurs in sedimentary rocks)"
      ],
      "links": [
        [
          "geology",
          "geology"
        ],
        [
          "lamina",
          "lamina"
        ]
      ],
      "raw_glosses": [
        "(geology) lamina (fine layer that occurs in sedimentary rocks)"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "other": "よーそー"
    },
    {
      "ipa": "[jo̞ːso̞ː]"
    }
  ],
  "word": "葉層"
}

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

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