"TCN" meaning in Vietnamese

{
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "phrase"
      },
      "expansion": "TCN",
      "name": "head"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "before the Common Era",
          "word": "trước Công Nguyên"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of trước Công Nguyên (“before the Common Era”)."
      ],
      "id": "en-TCN-vi-phrase-TPfwWckE",
      "links": [
        [
          "trước",
          "trước#Vietnamese"
        ],
        [
          "Công Nguyên",
          "Công Nguyên#Vietnamese"
        ],
        [
          "Common Era",
          "Common Era#English"
        ]
      ],
      "related": [
        {
          "word": "CN"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡ɕɨək̚˧˦ kəwŋ͡m˧˧ ŋwiən˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ʈɨək̚˦˧˥ kəwŋ͡m˧˧ ŋwiəŋ˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ʈɨək̚˦˥ kəwŋ͡m˧˧ ŋwiəŋ˧˧]",
      "tags": [
        "Hồ-Chí-Minh-City"
      ]
    }
  ],
  "word": "TCN"
}

{
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "phrase"
      },
      "expansion": "TCN",
      "name": "head"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "phrase",
  "related": [
    {
      "word": "CN"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "extra": "before the Common Era",
          "word": "trước Công Nguyên"
        }
      ],
      "categories": [
        "Vietnamese entries with incorrect language header",
        "Vietnamese initialisms",
        "Vietnamese lemmas",
        "Vietnamese phrases",
        "Vietnamese terms with IPA pronunciation"
      ],
      "glosses": [
        "Initialism of trước Công Nguyên (“before the Common Era”)."
      ],
      "links": [
        [
          "trước",
          "trước#Vietnamese"
        ],
        [
          "Công Nguyên",
          "Công Nguyên#Vietnamese"
        ],
        [
          "Common Era",
          "Common Era#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡ɕɨək̚˧˦ kəwŋ͡m˧˧ ŋwiən˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ʈɨək̚˦˧˥ kəwŋ͡m˧˧ ŋwiəŋ˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ʈɨək̚˦˥ kəwŋ͡m˧˧ ŋwiəŋ˧˧]",
      "tags": [
        "Hồ-Chí-Minh-City"
      ]
    }
  ],
  "word": "TCN"
}