"stathmograph" meaning in English

{
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    {
      "args": {
        "1": "en",
        "2": "grc",
        "t": "a measuring line"
      },
      "expansion": "Ancient Greek [Term?] (“a measuring line”)",
      "name": "der"
    },
    {
      "args": {
        "1": "en",
        "2": "-graph"
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      "expansion": "-graph",
      "name": "af"
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  ],
  "etymology_text": "From Ancient Greek [Term?] (“a measuring line”) + -graph.",
  "forms": [
    {
      "form": "stathmographs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "stathmograph (plural stathmographs)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "kind": "other",
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          "source": "w"
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        {
          "kind": "other",
          "name": "English terms suffixed with -graph",
          "parents": [],
          "source": "w"
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      ],
      "glosses": [
        "A device for recording the speed of a railway train."
      ],
      "id": "en-stathmograph-en-noun-tEhglvJ-",
      "links": [
        [
          "record",
          "record"
        ],
        [
          "speed",
          "speed"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "train",
          "train"
        ]
      ]
    }
  ],
  "word": "stathmograph"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "t": "a measuring line"
      },
      "expansion": "Ancient Greek [Term?] (“a measuring line”)",
      "name": "der"
    },
    {
      "args": {
        "1": "en",
        "2": "-graph"
      },
      "expansion": "-graph",
      "name": "af"
    }
  ],
  "etymology_text": "From Ancient Greek [Term?] (“a measuring line”) + -graph.",
  "forms": [
    {
      "form": "stathmographs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "stathmograph (plural stathmographs)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      ],
      "glosses": [
        "A device for recording the speed of a railway train."
      ],
      "links": [
        [
          "record",
          "record"
        ],
        [
          "speed",
          "speed"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "train",
          "train"
        ]
      ]
    }
  ],
  "word": "stathmograph"
}