"myasthenia" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "my",
        "3": "asthenia",
        "gloss1": "relating to muscle",
        "gloss2": "weakness"
      },
      "expansion": "my- (“relating to muscle”) + asthenia (“weakness”)",
      "name": "prefix"
    },
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "ἀσθένεια",
        "4": "",
        "5": "weakness"
      },
      "expansion": "Ancient Greek ἀσθένεια (asthéneia, “weakness”)",
      "name": "uder"
    }
  ],
  "etymology_text": "From my- (“relating to muscle”) + asthenia (“weakness”), from Ancient Greek ἀσθένεια (asthéneia, “weakness”).",
  "forms": [
    {
      "form": "myasthenias",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "myasthenia (countable and uncountable, plural myasthenias)",
      "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 my-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "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": "Medicine",
          "orig": "en:Medicine",
          "parents": [
            "Biology",
            "Healthcare",
            "Sciences",
            "Health",
            "All topics",
            "Body",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "amyosthenia"
        },
        {
          "word": "myasthenic"
        },
        {
          "word": "neuromyasthenia"
        },
        {
          "word": "myasthenia gravis"
        }
      ],
      "glosses": [
        "Abnormal weakness of the muscles; but especially myasthenia gravis."
      ],
      "id": "en-myasthenia-en-noun-BqYRJQnP",
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "weakness",
          "weakness"
        ],
        [
          "muscle",
          "muscle"
        ],
        [
          "myasthenia gravis",
          "myasthenia gravis"
        ]
      ],
      "raw_glosses": [
        "(medicine) Abnormal weakness of the muscles; but especially myasthenia gravis."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "medicine",
        "sciences"
      ],
      "wikipedia": [
        "myasthenia"
      ]
    }
  ],
  "word": "myasthenia"
}

{
  "derived": [
    {
      "word": "amyosthenia"
    },
    {
      "word": "myasthenic"
    },
    {
      "word": "neuromyasthenia"
    },
    {
      "word": "myasthenia gravis"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "my",
        "3": "asthenia",
        "gloss1": "relating to muscle",
        "gloss2": "weakness"
      },
      "expansion": "my- (“relating to muscle”) + asthenia (“weakness”)",
      "name": "prefix"
    },
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "ἀσθένεια",
        "4": "",
        "5": "weakness"
      },
      "expansion": "Ancient Greek ἀσθένεια (asthéneia, “weakness”)",
      "name": "uder"
    }
  ],
  "etymology_text": "From my- (“relating to muscle”) + asthenia (“weakness”), from Ancient Greek ἀσθένεια (asthéneia, “weakness”).",
  "forms": [
    {
      "form": "myasthenias",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "myasthenia (countable and uncountable, plural myasthenias)",
      "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 terms derived from Ancient Greek",
        "English terms prefixed with my-",
        "English uncountable nouns",
        "English undefined derivations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Medicine"
      ],
      "glosses": [
        "Abnormal weakness of the muscles; but especially myasthenia gravis."
      ],
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "weakness",
          "weakness"
        ],
        [
          "muscle",
          "muscle"
        ],
        [
          "myasthenia gravis",
          "myasthenia gravis"
        ]
      ],
      "raw_glosses": [
        "(medicine) Abnormal weakness of the muscles; but especially myasthenia gravis."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "medicine",
        "sciences"
      ],
      "wikipedia": [
        "myasthenia"
      ]
    }
  ],
  "word": "myasthenia"
}