"Bovey coal" meaning in English

{
  "etymology_text": "Found at Bovey Tracey, Devonshire, England.",
  "head_templates": [
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      "expansion": "Bovey coal (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      ],
      "glosses": [
        "A kind of brown lignite."
      ],
      "id": "en-Bovey_coal-en-noun-ZZGASKua",
      "links": [
        [
          "mineralogy",
          "mineralogy"
        ],
        [
          "lignite",
          "lignite"
        ]
      ],
      "raw_glosses": [
        "(mineralogy) A kind of brown lignite."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "geography",
        "geology",
        "mineralogy",
        "natural-sciences",
        "physical-sciences"
      ],
      "wikipedia": [
        "Bovey Tracey",
        "Bovey coal"
      ]
    }
  ],
  "word": "Bovey coal"
}

{
  "etymology_text": "Found at Bovey Tracey, Devonshire, England.",
  "head_templates": [
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      "expansion": "Bovey coal (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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      "glosses": [
        "A kind of brown lignite."
      ],
      "links": [
        [
          "mineralogy",
          "mineralogy"
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        [
          "lignite",
          "lignite"
        ]
      ],
      "raw_glosses": [
        "(mineralogy) A kind of brown lignite."
      ],
      "tags": [
        "uncountable"
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      "topics": [
        "chemistry",
        "geography",
        "geology",
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        "physical-sciences"
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        "Bovey Tracey",
        "Bovey coal"
      ]
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  ],
  "word": "Bovey coal"
}