"time grapher" meaning in English

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      "expansion": "time graph + -er",
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  "etymology_text": "From time graph + -er.",
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  "lang_code": "en",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Timekeeping",
          "orig": "en:Timekeeping",
          "parents": [
            "Time",
            "All topics",
            "Fundamental"
          ],
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      ],
      "glosses": [
        "A piece of equipment employed to probe the performance of a watch in accurately depicting time."
      ],
      "id": "en-time_grapher-en-noun-v4C121Zb",
      "links": [
        [
          "probe",
          "probe"
        ],
        [
          "watch",
          "watch"
        ],
        [
          "time",
          "time"
        ]
      ],
      "synonyms": [
        {
          "word": "chronocomparator"
        },
        {
          "word": "watch timing machine"
        },
        {
          "word": "time-grapher"
        },
        {
          "word": "timegrapher"
        }
      ],
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          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "käyntitarkkuuden mittauslaite"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "Zeitwaage"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "Chronokomparator"
        }
      ]
    }
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  "word": "time grapher"
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  "etymology_text": "From time graph + -er.",
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      "form": "time graphers",
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        "plural"
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  "lang_code": "en",
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        "en:Timekeeping"
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        "A piece of equipment employed to probe the performance of a watch in accurately depicting time."
      ],
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        [
          "probe",
          "probe"
        ],
        [
          "watch",
          "watch"
        ],
        [
          "time",
          "time"
        ]
      ],
      "synonyms": [
        {
          "word": "chronocomparator"
        },
        {
          "word": "watch timing machine"
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  "synonyms": [
    {
      "word": "time-grapher"
    },
    {
      "word": "timegrapher"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "käyntitarkkuuden mittauslaite"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "Zeitwaage"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "tags": [
        "masculine"
      ],
      "word": "Chronokomparator"
    }
  ],
  "word": "time grapher"
}