"perle des cavernes" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Dates manquantes en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en allemand",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en espagnol",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(Date à préciser) Nomcomposé de perle, des et cavernes."
  ],
  "forms": [
    {
      "form": "perles des cavernes",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "colspan=\"2\" :Modèle:!\\pɛʁl de ka.vɛʁn\\",
      "tags": [
        "singular"
      ]
    }
  ],
  "hypernyms": [
    {
      "word": "spéléothème"
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "oolithe"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en français",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en français de la minéralogie",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en français de la spéléologie",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "Magda Contino, La belle aux gerfauts, 1977, Éditions France-Empire",
          "text": "Stéphane s’arrêta pour montrer à sa campagne un des plus jolis produits des profondeurs : la perle des cavernes."
        }
      ],
      "glosses": [
        "Concrétion calcaire sphérique à structure concentrique."
      ],
      "id": "fr-perle_des_cavernes-fr-noun-mryjkBnx",
      "raw_tags": [
        "Spéléologie"
      ],
      "topics": [
        "mineralogy"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pɛʁl de ka.vɛʁn\\"
    }
  ],
  "synonyms": [
    {
      "word": "pisolithe"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Allemand",
      "lang_code": "de",
      "word": "Höhlenperl"
    },
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "cave pearl"
    },
    {
      "lang": "Espagnol",
      "lang_code": "es",
      "word": "perla de las cavernas"
    }
  ],
  "word": "perle des cavernes"
}

{
  "categories": [
    "Compositions en français",
    "Dates manquantes en français",
    "Locutions nominales en français",
    "Traductions en allemand",
    "Traductions en anglais",
    "Traductions en espagnol",
    "français"
  ],
  "etymology_texts": [
    "(Date à préciser) Nomcomposé de perle, des et cavernes."
  ],
  "forms": [
    {
      "form": "perles des cavernes",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "colspan=\"2\" :Modèle:!\\pɛʁl de ka.vɛʁn\\",
      "tags": [
        "singular"
      ]
    }
  ],
  "hypernyms": [
    {
      "word": "spéléothème"
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "oolithe"
    }
  ],
  "senses": [
    {
      "categories": [
        "Exemples en français",
        "Lexique en français de la minéralogie",
        "Lexique en français de la spéléologie"
      ],
      "examples": [
        {
          "ref": "Magda Contino, La belle aux gerfauts, 1977, Éditions France-Empire",
          "text": "Stéphane s’arrêta pour montrer à sa campagne un des plus jolis produits des profondeurs : la perle des cavernes."
        }
      ],
      "glosses": [
        "Concrétion calcaire sphérique à structure concentrique."
      ],
      "raw_tags": [
        "Spéléologie"
      ],
      "topics": [
        "mineralogy"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pɛʁl de ka.vɛʁn\\"
    }
  ],
  "synonyms": [
    {
      "word": "pisolithe"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Allemand",
      "lang_code": "de",
      "word": "Höhlenperl"
    },
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "cave pearl"
    },
    {
      "lang": "Espagnol",
      "lang_code": "es",
      "word": "perla de las cavernas"
    }
  ],
  "word": "perle des cavernes"
}