"УДК" meaning in Russian

{
  "forms": [
    {
      "form": "UDK",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "m-in",
        "3": "-"
      },
      "expansion": "УДК • (UDK) m inan (indeclinable)",
      "name": "ru-noun"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(universalʹnaja desjatičnaja klassifikacija, “Universal Decimal Classification”); UDC",
          "word": "универсальная десятичная классификация"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "initialism of универсальная десятичная классификация (universalʹnaja desjatičnaja klassifikacija, “Universal Decimal Classification”); UDC"
      ],
      "id": "en-УДК-ru-noun-V4mLaDwi",
      "links": [
        [
          "универсальная десятичная классификация",
          "универсальная десятичная классификация#Russian"
        ],
        [
          "UDC",
          "UDC"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "indeclinable",
        "initialism"
      ]
    }
  ],
  "word": "УДК"
}

{
  "forms": [
    {
      "form": "UDK",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "m-in",
        "3": "-"
      },
      "expansion": "УДК • (UDK) m inan (indeclinable)",
      "name": "ru-noun"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(universalʹnaja desjatičnaja klassifikacija, “Universal Decimal Classification”); UDC",
          "word": "универсальная десятичная классификация"
        }
      ],
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Russian abbreviations",
        "Russian entries with incorrect language header",
        "Russian inanimate nouns",
        "Russian indeclinable nouns",
        "Russian initialisms",
        "Russian lemmas",
        "Russian masculine nouns",
        "Russian nouns",
        "Russian terms with redundant head parameter"
      ],
      "glosses": [
        "initialism of универсальная десятичная классификация (universalʹnaja desjatičnaja klassifikacija, “Universal Decimal Classification”); UDC"
      ],
      "links": [
        [
          "универсальная десятичная классификация",
          "универсальная десятичная классификация#Russian"
        ],
        [
          "UDC",
          "UDC"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "indeclinable",
        "initialism"
      ]
    }
  ],
  "word": "УДК"
}