"steam coal" meaning in English

{
  "forms": [
    {
      "form": "steam coals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "steam coal (usually uncountable, plural steam coals)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mandarin terms with redundant transliterations",
          "parents": [
            "Terms with redundant transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Coal",
          "orig": "en:Coal",
          "parents": [
            "Fossil fuels",
            "Carbon",
            "Energy",
            "Natural resources",
            "Carbon group elements",
            "Nature",
            "Matter",
            "Chemical elements",
            "All topics",
            "Chemistry",
            "Fundamental",
            "Sciences"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A coal which has a grade between bituminous coal and anthracite, and which was once widely used as a fuel for steam engines in ships and locomotives."
      ],
      "id": "en-steam_coal-en-noun-R3znbpYe",
      "links": [
        [
          "bituminous",
          "bituminous"
        ],
        [
          "anthracite",
          "anthracite"
        ],
        [
          "steam engine",
          "steam engine"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "US"
          ],
          "word": "sea-coal"
        }
      ],
      "tags": [
        "uncountable",
        "usually"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "grade of coal",
          "word": "動力煤"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "dònglìméi",
          "sense": "grade of coal",
          "word": "动力煤"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "grade of coal",
          "word": "höyryhiili"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "parovíčnyj úgolʹ",
          "sense": "grade of coal",
          "tags": [
            "masculine"
          ],
          "word": "парови́чный у́голь"
        }
      ]
    }
  ],
  "word": "steam coal"
}

{
  "forms": [
    {
      "form": "steam coals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "steam coal (usually uncountable, plural steam coals)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English uncountable nouns",
        "Mandarin terms with redundant transliterations",
        "en:Coal"
      ],
      "glosses": [
        "A coal which has a grade between bituminous coal and anthracite, and which was once widely used as a fuel for steam engines in ships and locomotives."
      ],
      "links": [
        [
          "bituminous",
          "bituminous"
        ],
        [
          "anthracite",
          "anthracite"
        ],
        [
          "steam engine",
          "steam engine"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "US"
      ],
      "word": "sea-coal"
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "grade of coal",
      "word": "動力煤"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "dònglìméi",
      "sense": "grade of coal",
      "word": "动力煤"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "grade of coal",
      "word": "höyryhiili"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "parovíčnyj úgolʹ",
      "sense": "grade of coal",
      "tags": [
        "masculine"
      ],
      "word": "парови́чный у́голь"
    }
  ],
  "word": "steam coal"
}