"coking coal" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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          "ref": "1959 May, R. A. Savill, “The coal traffic of the North Eastern Region”, in Trains Illustrated, page 272:",
          "text": "All grades of coal, deepmined and opencast, are produced, and Durham coking coal is unsurpassed for iron and steel making and is world-famous.",
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        {
          "ref": "1962 December, “Railways and the Spencer Steelworks”, in Modern Railways, page 410:",
          "text": "Among the numerous types of vehicles required are special 33½-ton vacuum-braked hopper wagons for iron ore imported at Newport docks, 21-ton vacuum-braked wagons for coking-coal and 56-ton vehicles for slabs and coils.",
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      "glosses": [
        "Bituminous coal which is suitable for making into coke, for example for use in steel manufacture."
      ],
      "id": "en-coking_coal-en-noun-Do4CIP9F",
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          "coke",
          "coke"
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      "related": [
        {
          "word": "coke"
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        {
          "word": "metallurgical coal"
        },
        {
          "word": "thermal coal"
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      "wikipedia": [
        "Coke (fuel)",
        "Metallurgical coal"
      ]
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  "word": "coking coal"
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  "lang_code": "en",
  "pos": "noun",
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    {
      "word": "coke"
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    {
      "word": "metallurgical coal"
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      "word": "thermal coal"
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      "glosses": [
        "Bituminous coal which is suitable for making into coke, for example for use in steel manufacture."
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  "word": "coking coal"
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