"charbon de pierre" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Locutions nominales en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "→ voir charbon et pierre : carbo petroeus, lithantrax."
  ],
  "forms": [
    {
      "form": "charbons de pierre",
      "tags": [
        "plural"
      ]
    }
  ],
  "hypernyms": [
    {
      "word": "charbon"
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "notes": [
    "L’écriture descriptive, avec trait d’union, est attestée seulement chez Antoine de Rivarol."
  ],
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "charbon-de-pierre"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en français",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Minéraux en français",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "les mines de charbon",
          "text": "Rien ne nous permet d’affirmer que les Romains aient connu l’existence du charbon de pierre."
        }
      ],
      "glosses": [
        "Substance bitumineuse inflammable servant de combustible."
      ],
      "id": "fr-charbon_de_pierre-fr-noun-n9IppxmD",
      "topics": [
        "mineralogy"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ʃaʁ.bɔ̃ də pjɛʁ\\"
    }
  ],
  "synonyms": [
    {
      "word": "anthracite"
    },
    {
      "word": "charbon minéral"
    },
    {
      "word": "charbon de terre"
    },
    {
      "word": "gagate"
    },
    {
      "word": "houille"
    },
    {
      "word": "jais"
    },
    {
      "word": "jayet"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "charbon de pierre"
}

{
  "categories": [
    "Locutions nominales en français",
    "français"
  ],
  "etymology_texts": [
    "→ voir charbon et pierre : carbo petroeus, lithantrax."
  ],
  "forms": [
    {
      "form": "charbons de pierre",
      "tags": [
        "plural"
      ]
    }
  ],
  "hypernyms": [
    {
      "word": "charbon"
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "notes": [
    "L’écriture descriptive, avec trait d’union, est attestée seulement chez Antoine de Rivarol."
  ],
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "charbon-de-pierre"
    }
  ],
  "senses": [
    {
      "categories": [
        "Exemples en français",
        "Minéraux en français"
      ],
      "examples": [
        {
          "ref": "les mines de charbon",
          "text": "Rien ne nous permet d’affirmer que les Romains aient connu l’existence du charbon de pierre."
        }
      ],
      "glosses": [
        "Substance bitumineuse inflammable servant de combustible."
      ],
      "topics": [
        "mineralogy"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ʃaʁ.bɔ̃ də pjɛʁ\\"
    }
  ],
  "synonyms": [
    {
      "word": "anthracite"
    },
    {
      "word": "charbon minéral"
    },
    {
      "word": "charbon de terre"
    },
    {
      "word": "gagate"
    },
    {
      "word": "houille"
    },
    {
      "word": "jais"
    },
    {
      "word": "jayet"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "charbon de pierre"
}