"Mapu chuco" meaning in Mapudungun

{
  "head_templates": [
    {
      "args": {
        "1": "arn",
        "2": "proper noun"
      },
      "expansion": "Mapu chuco",
      "name": "head"
    }
  ],
  "lang": "Mapudungun",
  "lang_code": "arn",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Mapudungun entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Mapocho River"
      ],
      "id": "en-Mapu_chuco-arn-name-WO9Tt0DX",
      "links": [
        [
          "Mapocho River",
          "Mapocho River"
        ]
      ]
    }
  ],
  "word": "Mapu chuco"
}

{
  "head_templates": [
    {
      "args": {
        "1": "arn",
        "2": "proper noun"
      },
      "expansion": "Mapu chuco",
      "name": "head"
    }
  ],
  "lang": "Mapudungun",
  "lang_code": "arn",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Mapudungun entries with incorrect language header",
        "Mapudungun lemmas",
        "Mapudungun multiword terms",
        "Mapudungun proper nouns"
      ],
      "glosses": [
        "Mapocho River"
      ],
      "links": [
        [
          "Mapocho River",
          "Mapocho River"
        ]
      ]
    }
  ],
  "word": "Mapu chuco"
}