"㏢" meaning in Chinese

{
  "etymology_templates": [
    {
      "args": {
        "1": "zh",
        "2": "㏢"
      },
      "expansion": "㏢",
      "name": "lang"
    },
    {
      "args": {
        "1": "zh",
        "2": "表"
      },
      "expansion": "表",
      "name": "lang"
    },
    {
      "args": {
        "1": "zh",
        "2": "标准电码本（修订本）"
      },
      "expansion": "标准电码本（修订本）",
      "name": "lang"
    }
  ],
  "etymology_text": "This telegraph symbol ㏢ became part of Unicode due to its inclusion in Row 15 of GB 8565.2-88 表 A4 (1988), from 9903 of 标准电码本（修订本） (1983). First appears in 1933. See also Appendix:Chinese telegraph code/Mainland 1983 and Chinese telegraph code.",
  "head_templates": [
    {
      "args": {
        "1": "zh",
        "2": "symbol",
        "3": "hanzi",
        "4": "3日"
      },
      "expansion": "㏢ (hanzi 3日)",
      "name": "head"
    }
  ],
  "lang": "Chinese",
  "lang_code": "zh",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Chinese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Chinese symbols",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "zh",
          "name": "Telegraphy",
          "orig": "zh:Telegraphy",
          "parents": [
            "Electronics",
            "Telecommunications",
            "Technology",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "the third day of the month"
      ],
      "id": "en-㏢-zh-symbol-tluIYPBO",
      "links": [
        [
          "telegraphy",
          "telegraphy"
        ],
        [
          "third",
          "third"
        ],
        [
          "day",
          "day"
        ]
      ],
      "raw_glosses": [
        "(telegraphy) the third day of the month"
      ],
      "topics": [
        "communications",
        "electrical-engineering",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "telecommunications",
        "telegraphy"
      ],
      "wikipedia": [
        "Chinese telegraph code"
      ]
    }
  ],
  "word": "㏢"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "zh",
        "2": "㏢"
      },
      "expansion": "㏢",
      "name": "lang"
    },
    {
      "args": {
        "1": "zh",
        "2": "表"
      },
      "expansion": "表",
      "name": "lang"
    },
    {
      "args": {
        "1": "zh",
        "2": "标准电码本（修订本）"
      },
      "expansion": "标准电码本（修订本）",
      "name": "lang"
    }
  ],
  "etymology_text": "This telegraph symbol ㏢ became part of Unicode due to its inclusion in Row 15 of GB 8565.2-88 表 A4 (1988), from 9903 of 标准电码本（修订本） (1983). First appears in 1933. See also Appendix:Chinese telegraph code/Mainland 1983 and Chinese telegraph code.",
  "head_templates": [
    {
      "args": {
        "1": "zh",
        "2": "symbol",
        "3": "hanzi",
        "4": "3日"
      },
      "expansion": "㏢ (hanzi 3日)",
      "name": "head"
    }
  ],
  "lang": "Chinese",
  "lang_code": "zh",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        "Chinese entries with incorrect language header",
        "Chinese lemmas",
        "Chinese symbols",
        "Pages with 1 entry",
        "Pages with entries",
        "zh:Telegraphy"
      ],
      "glosses": [
        "the third day of the month"
      ],
      "links": [
        [
          "telegraphy",
          "telegraphy"
        ],
        [
          "third",
          "third"
        ],
        [
          "day",
          "day"
        ]
      ],
      "raw_glosses": [
        "(telegraphy) the third day of the month"
      ],
      "topics": [
        "communications",
        "electrical-engineering",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "telecommunications",
        "telegraphy"
      ],
      "wikipedia": [
        "Chinese telegraph code"
      ]
    }
  ],
  "word": "㏢"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: hanzi 3日",
  "path": [
    "㏢"
  ],
  "section": "Chinese",
  "subsection": "symbol",
  "title": "㏢",
  "trace": ""
}