"single-wheeler" meaning in English

{
  "forms": [
    {
      "form": "single-wheelers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "single-wheeler (plural single-wheelers)",
      "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": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1941 February, O. S. Nock, “The Locomotives of Sir Nigel Gresley: Part 1—G.N.R. 1911-1914”, in Railway Magazine, page 77",
          "text": "It links the time when single-wheelers were still being used on crack expresses to our modern streamline age, when up to the outbreak of war developments both at home and overseas were following thick and fast upon each other.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A steam locomotive with a single driving axle."
      ],
      "id": "en-single-wheeler-en-noun-yB7aKcmp",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "steam locomotive",
          "steam locomotive"
        ],
        [
          "driving axle",
          "driving axle"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A steam locomotive with a single driving axle."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "single-wheeler"
}

{
  "forms": [
    {
      "form": "single-wheelers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "single-wheeler (plural single-wheelers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "1941 February, O. S. Nock, “The Locomotives of Sir Nigel Gresley: Part 1—G.N.R. 1911-1914”, in Railway Magazine, page 77",
          "text": "It links the time when single-wheelers were still being used on crack expresses to our modern streamline age, when up to the outbreak of war developments both at home and overseas were following thick and fast upon each other.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A steam locomotive with a single driving axle."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "steam locomotive",
          "steam locomotive"
        ],
        [
          "driving axle",
          "driving axle"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A steam locomotive with a single driving axle."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "single-wheeler"
}