"pneumomediastinum" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "pneumo",
        "3": "mediastinum"
      },
      "expansion": "pneumo- + mediastinum",
      "name": "prefix"
    }
  ],
  "etymology_text": "pneumo- + mediastinum",
  "forms": [
    {
      "form": "pneumomediastina",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~",
        "2": "pneumomediastina"
      },
      "expansion": "pneumomediastinum (countable and uncountable, plural pneumomediastina)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with pneumo-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1996, Richard A. Clinchy, Dive First Responder, page 73",
          "text": "Pneumomediastinum usually goes undiagnosed unless chest x-rays are used for evaluation.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The condition of having the presence of air in the mediastinum."
      ],
      "id": "en-pneumomediastinum-en-noun-9lf2rSaM",
      "links": [
        [
          "air",
          "air"
        ],
        [
          "mediastinum",
          "mediastinum"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "wikipedia": [
        "pneumomediastinum"
      ]
    }
  ],
  "word": "pneumomediastinum"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "pneumo",
        "3": "mediastinum"
      },
      "expansion": "pneumo- + mediastinum",
      "name": "prefix"
    }
  ],
  "etymology_text": "pneumo- + mediastinum",
  "forms": [
    {
      "form": "pneumomediastina",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~",
        "2": "pneumomediastina"
      },
      "expansion": "pneumomediastinum (countable and uncountable, plural pneumomediastina)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English terms prefixed with pneumo-",
        "English terms with quotations",
        "English uncountable nouns",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1996, Richard A. Clinchy, Dive First Responder, page 73",
          "text": "Pneumomediastinum usually goes undiagnosed unless chest x-rays are used for evaluation.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The condition of having the presence of air in the mediastinum."
      ],
      "links": [
        [
          "air",
          "air"
        ],
        [
          "mediastinum",
          "mediastinum"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "wikipedia": [
        "pneumomediastinum"
      ]
    }
  ],
  "word": "pneumomediastinum"
}