"dynamometer car" meaning in English

{
  "forms": [
    {
      "form": "dynamometer cars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dynamometer car (plural dynamometer cars)",
      "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": "1959, Steam's Finest Hour, edited by David P. Morgan, Kalmbach Publishing Co., referring to the Union Pacific \"Big Boy\" 4-8-8-4",
          "text": "Wide open, a 4000 consumed up to 22 tons of coal and 100,000 pounds of water an hour and produced in one authenticated dynamometer-car test 6290 drawbar horsepower at 41.4 miles per hour.",
          "type": "quotation"
        },
        {
          "ref": "1963 January, “Motive power miscellany”, in Modern Railways, page 64",
          "text": "More trials of diesel locomotives with fitted mineral trains have been observed. On October 31 a Brush Type 2, No. D5834, was seen on the Doncaster-Scunthorpe line with dynamometer car and 32 loaded wagons.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A piece of railway rolling stock used to measure various aspects of a locomotive's performance."
      ],
      "id": "en-dynamometer_car-en-noun-HfIy6Qc2",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "rolling stock",
          "rolling stock"
        ],
        [
          "measure",
          "measure"
        ],
        [
          "locomotive",
          "locomotive"
        ],
        [
          "performance",
          "performance"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A piece of railway rolling stock used to measure various aspects of a locomotive's performance."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ],
      "wikipedia": [
        "dynamometer car"
      ]
    }
  ],
  "word": "dynamometer car"
}

{
  "forms": [
    {
      "form": "dynamometer cars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dynamometer car (plural dynamometer cars)",
      "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": "1959, Steam's Finest Hour, edited by David P. Morgan, Kalmbach Publishing Co., referring to the Union Pacific \"Big Boy\" 4-8-8-4",
          "text": "Wide open, a 4000 consumed up to 22 tons of coal and 100,000 pounds of water an hour and produced in one authenticated dynamometer-car test 6290 drawbar horsepower at 41.4 miles per hour.",
          "type": "quotation"
        },
        {
          "ref": "1963 January, “Motive power miscellany”, in Modern Railways, page 64",
          "text": "More trials of diesel locomotives with fitted mineral trains have been observed. On October 31 a Brush Type 2, No. D5834, was seen on the Doncaster-Scunthorpe line with dynamometer car and 32 loaded wagons.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A piece of railway rolling stock used to measure various aspects of a locomotive's performance."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "rolling stock",
          "rolling stock"
        ],
        [
          "measure",
          "measure"
        ],
        [
          "locomotive",
          "locomotive"
        ],
        [
          "performance",
          "performance"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A piece of railway rolling stock used to measure various aspects of a locomotive's performance."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ],
      "wikipedia": [
        "dynamometer car"
      ]
    }
  ],
  "word": "dynamometer car"
}