"strangling angel of children" meaning in English

{
  "etymology_text": "From being a childhood disease that causes suffocation of children when it creates biofilms in the lungs that prevent air from being exchanged with the blood.",
  "forms": [
    {
      "form": "the strangling angel of children",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun",
        "head": "the strangling angel of children"
      },
      "expansion": "the strangling angel of children",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "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"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Bacterial diseases",
          "orig": "en:Bacterial diseases",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "The disease diphtheria."
      ],
      "id": "en-strangling_angel_of_children-en-noun-aa5zgsxU",
      "links": [
        [
          "diphtheria",
          "diphtheria"
        ]
      ],
      "raw_glosses": [
        "(poetic) The disease diphtheria."
      ],
      "tags": [
        "poetic"
      ]
    }
  ],
  "word": "strangling angel of children"
}

{
  "etymology_text": "From being a childhood disease that causes suffocation of children when it creates biofilms in the lungs that prevent air from being exchanged with the blood.",
  "forms": [
    {
      "form": "the strangling angel of children",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun",
        "head": "the strangling angel of children"
      },
      "expansion": "the strangling angel of children",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English poetic terms",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Bacterial diseases"
      ],
      "glosses": [
        "The disease diphtheria."
      ],
      "links": [
        [
          "diphtheria",
          "diphtheria"
        ]
      ],
      "raw_glosses": [
        "(poetic) The disease diphtheria."
      ],
      "tags": [
        "poetic"
      ]
    }
  ],
  "word": "strangling angel of children"
}