"Mongolian idiocy" meaning in English

{
  "etymology_text": "Coined in the 19th century, referring to the supposed resemblance the afflicted children bore to the people of what was then known as the Mongolian race.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Mongolian idiocy",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "an archaic term for the condition now known as Down syndrome."
      ],
      "id": "en-Mongolian_idiocy-en-name-IEZXybt0",
      "raw_glosses": [
        "(now offensive) an archaic term for the condition now known as Down syndrome."
      ],
      "tags": [
        "offensive"
      ]
    }
  ],
  "word": "Mongolian idiocy"
}

{
  "etymology_text": "Coined in the 19th century, referring to the supposed resemblance the afflicted children bore to the people of what was then known as the Mongolian race.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Mongolian idiocy",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English offensive terms",
        "English proper nouns",
        "English uncountable nouns"
      ],
      "glosses": [
        "an archaic term for the condition now known as Down syndrome."
      ],
      "raw_glosses": [
        "(now offensive) an archaic term for the condition now known as Down syndrome."
      ],
      "tags": [
        "offensive"
      ]
    }
  ],
  "word": "Mongolian idiocy"
}