"US-DC" meaning in Translingual

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "US",
        "3": "DC",
        "lang2": "en",
        "t1": "United States",
        "t2": "District of Columbia"
      },
      "expansion": "US (“United States”) + English DC (“District of Columbia”)",
      "name": "affix"
    }
  ],
  "etymology_text": "Binomial compound of US (“United States”) + English DC (“District of Columbia”)",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "10": "",
        "2": "symbol",
        "3": "",
        "4": "",
        "5": "or",
        "6": "",
        "7": "or",
        "8": "",
        "9": "or",
        "cat2": "",
        "f1lang": "en",
        "f1nolink": "",
        "f2lang": "en",
        "f2nolink": "",
        "f3lang": "en",
        "f3nolink": "",
        "f4lang": "en",
        "f4nolink": "",
        "head": "US-DC",
        "head2": "",
        "head3": "",
        "head4": "",
        "nolinkhead": "",
        "sc": "Latn",
        "sort": ""
      },
      "expansion": "US-DC",
      "name": "head"
    },
    {
      "args": {
        "head": "US-DC"
      },
      "expansion": "US-DC",
      "name": "mul-symbol"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English links with ignored alt parameters",
          "parents": [
            "Links with ignored alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "ISO 3166-1 alpha-2",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "mul",
          "name": "United States",
          "orig": "mul:United States",
          "parents": [
            "North America",
            "America",
            "Earth",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "ISO 3166-1 alpha-2 country code for the District of Columbia."
      ],
      "id": "en-US-DC-mul-symbol-DSvCSkiB",
      "links": [
        [
          "ISO 3166-1",
          "w:ISO 3166-1"
        ],
        [
          "alpha-2",
          "w:ISO 3166-1 alpha-2"
        ],
        [
          "country code",
          "country code#English"
        ],
        [
          "District of Columbia",
          "District of Columbia#English"
        ]
      ],
      "qualifier": "international standards",
      "raw_glosses": [
        "(international standards) ISO 3166-1 alpha-2 country code for the District of Columbia."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/juː ɛs diː siː/"
    }
  ],
  "word": "US-DC"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "US",
        "3": "DC",
        "lang2": "en",
        "t1": "United States",
        "t2": "District of Columbia"
      },
      "expansion": "US (“United States”) + English DC (“District of Columbia”)",
      "name": "affix"
    }
  ],
  "etymology_text": "Binomial compound of US (“United States”) + English DC (“District of Columbia”)",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "10": "",
        "2": "symbol",
        "3": "",
        "4": "",
        "5": "or",
        "6": "",
        "7": "or",
        "8": "",
        "9": "or",
        "cat2": "",
        "f1lang": "en",
        "f1nolink": "",
        "f2lang": "en",
        "f2nolink": "",
        "f3lang": "en",
        "f3nolink": "",
        "f4lang": "en",
        "f4nolink": "",
        "head": "US-DC",
        "head2": "",
        "head3": "",
        "head4": "",
        "nolinkhead": "",
        "sc": "Latn",
        "sort": ""
      },
      "expansion": "US-DC",
      "name": "head"
    },
    {
      "args": {
        "head": "US-DC"
      },
      "expansion": "US-DC",
      "name": "mul-symbol"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        "English links with ignored alt parameters",
        "ISO 3166-1 alpha-2",
        "Pages with 1 entry",
        "Pages with entries",
        "Translingual compound terms",
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual symbols",
        "Translingual terms derived from English",
        "Translingual terms with redundant script codes",
        "mul:United States"
      ],
      "glosses": [
        "ISO 3166-1 alpha-2 country code for the District of Columbia."
      ],
      "links": [
        [
          "ISO 3166-1",
          "w:ISO 3166-1"
        ],
        [
          "alpha-2",
          "w:ISO 3166-1 alpha-2"
        ],
        [
          "country code",
          "country code#English"
        ],
        [
          "District of Columbia",
          "District of Columbia#English"
        ]
      ],
      "qualifier": "international standards",
      "raw_glosses": [
        "(international standards) ISO 3166-1 alpha-2 country code for the District of Columbia."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/juː ɛs diː siː/"
    }
  ],
  "word": "US-DC"
}