"sierra musical" meaning in Espagnol

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en espagnol",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Genres manquants en espagnol",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Instruments de musique en espagnol",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en espagnol",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Espagnol",
      "orig": "espagnol",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de sierra et de musical."
  ],
  "lang": "Espagnol",
  "lang_code": "es",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "raw_tags": [
    "genre à préciser : {{m}}, {{f}}, {{mf}}, {{n}} ?"
  ],
  "senses": [
    {
      "glosses": [
        "Scie musicale, lame sonore."
      ],
      "id": "fr-sierra_musical-es-noun-4~yZ4YBU"
    }
  ],
  "synonyms": [
    {
      "word": "hoja sonora"
    }
  ],
  "word": "sierra musical"
}

{
  "categories": [
    "Compositions en espagnol",
    "Genres manquants en espagnol",
    "Instruments de musique en espagnol",
    "Locutions nominales en espagnol",
    "espagnol"
  ],
  "etymology_texts": [
    "Composé de sierra et de musical."
  ],
  "lang": "Espagnol",
  "lang_code": "es",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "raw_tags": [
    "genre à préciser : {{m}}, {{f}}, {{mf}}, {{n}} ?"
  ],
  "senses": [
    {
      "glosses": [
        "Scie musicale, lame sonore."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "hoja sonora"
    }
  ],
  "word": "sierra musical"
}