"DDx" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "?",
        "head": "DDx"
      },
      "expansion": "DDx",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "differential diagnosis"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of differential diagnosis."
      ],
      "id": "en-DDx-en-noun-iMRV-tfD",
      "links": [
        [
          "differential diagnosis",
          "differential diagnosis#English"
        ]
      ],
      "related": [
        {
          "word": "Dx"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of"
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    }
  ],
  "word": "DDx"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?",
        "head": "DDx"
      },
      "expansion": "DDx",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Dx"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "differential diagnosis"
        }
      ],
      "categories": [
        "English abbreviations",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Abbreviation of differential diagnosis."
      ],
      "links": [
        [
          "differential diagnosis",
          "differential diagnosis#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
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    }
  ],
  "word": "DDx"
}