"supinador largo" meaning in Spanish

{
  "forms": [
    {
      "form": "supinadores largos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "supinador largo m (plural supinadores largos)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "es",
          "name": "Muscles",
          "orig": "es:Muscles",
          "parents": [
            "Body parts",
            "Body",
            "Anatomy",
            "All topics",
            "Biology",
            "Medicine",
            "Fundamental",
            "Sciences",
            "Healthcare",
            "Health"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "brachioradialis"
      ],
      "id": "en-supinador_largo-es-noun-kFqKDTXM",
      "links": [
        [
          "brachioradialis",
          "brachioradialis"
        ]
      ],
      "synonyms": [
        {
          "word": "braquiorradial"
        }
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "es:supinador largo"
      ]
    }
  ],
  "word": "supinador largo"
}

{
  "forms": [
    {
      "form": "supinadores largos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "supinador largo m (plural supinadores largos)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Spanish countable nouns",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish masculine nouns",
        "Spanish multiword terms",
        "Spanish nouns",
        "es:Muscles"
      ],
      "glosses": [
        "brachioradialis"
      ],
      "links": [
        [
          "brachioradialis",
          "brachioradialis"
        ]
      ],
      "synonyms": [
        {
          "word": "braquiorradial"
        }
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "es:supinador largo"
      ]
    }
  ],
  "word": "supinador largo"
}