"plethysmograph" meaning in English

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        "3": "πληθυσμός",
        "t": "enlargement"
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      "name": "bor"
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  "etymology_text": "Late 19th century: from Ancient Greek πληθυσμός (plēthusmós, “enlargement”) + -graph.",
  "forms": [
    {
      "form": "plethysmographs",
      "tags": [
        "plural"
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  "lang_code": "en",
  "pos": "noun",
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      "derived": [
        {
          "word": "photoplethysmograph"
        },
        {
          "word": "plethysmography"
        }
      ],
      "glosses": [
        "An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains)."
      ],
      "id": "en-plethysmograph-en-noun-je4aEvfN",
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      "raw_glosses": [
        "(medicine) An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains)."
      ],
      "topics": [
        "medicine",
        "sciences"
      ],
      "wikipedia": [
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  "sounds": [
    {
      "ipa": "/plɛˈðɪz.məˌɡɹæf/",
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    {
      "ipa": "/pləˈðɪz.məˌɡɹæf/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "plethysmograph"
}

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    {
      "word": "photoplethysmograph"
    },
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      "word": "plethysmography"
    }
  ],
  "etymology_templates": [
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      "args": {
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        "3": "πληθυσμός",
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      "expansion": "Ancient Greek πληθυσμός (plēthusmós, “enlargement”)",
      "name": "bor"
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  "etymology_text": "Late 19th century: from Ancient Greek πληθυσμός (plēthusmós, “enlargement”) + -graph.",
  "forms": [
    {
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      "tags": [
        "plural"
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  "pos": "noun",
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        "An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains)."
      ],
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        "(medicine) An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains)."
      ],
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        "medicine",
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      ],
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  "word": "plethysmograph"
}