"chalasia" meaning in English

{
  "etymology_text": "chalas- + -ia",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "chalasia",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Pathology",
          "orig": "en:Pathology",
          "parents": [
            "Disease",
            "Medicine",
            "Health",
            "Biology",
            "Healthcare",
            "Body",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "relaxation of a normally contracted muscle, especially a sphincter"
      ],
      "id": "en-chalasia-en-noun-kwUQY4MM",
      "links": [
        [
          "pathology",
          "pathology"
        ],
        [
          "relaxation",
          "relaxation"
        ],
        [
          "contracted",
          "contracted"
        ],
        [
          "muscle",
          "muscle"
        ],
        [
          "sphincter",
          "sphincter"
        ]
      ],
      "raw_glosses": [
        "(pathology) relaxation of a normally contracted muscle, especially a sphincter"
      ],
      "topics": [
        "medicine",
        "pathology",
        "sciences"
      ]
    }
  ],
  "word": "chalasia"
}

{
  "etymology_text": "chalas- + -ia",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "chalasia",
      "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 unknown or uncertain plurals",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Pathology"
      ],
      "glosses": [
        "relaxation of a normally contracted muscle, especially a sphincter"
      ],
      "links": [
        [
          "pathology",
          "pathology"
        ],
        [
          "relaxation",
          "relaxation"
        ],
        [
          "contracted",
          "contracted"
        ],
        [
          "muscle",
          "muscle"
        ],
        [
          "sphincter",
          "sphincter"
        ]
      ],
      "raw_glosses": [
        "(pathology) relaxation of a normally contracted muscle, especially a sphincter"
      ],
      "topics": [
        "medicine",
        "pathology",
        "sciences"
      ]
    }
  ],
  "word": "chalasia"
}