"Fortin barometer" meaning in English

{
  "etymology_text": "Invented by Jean Nicolas Fortin.",
  "forms": [
    {
      "form": "Fortin barometers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Fortin barometer (plural Fortin barometers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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      "glosses": [
        "A kind of barometer using a variable-displacement mercury cistern, usually constructed with a thumbscrew pressing on a leather diaphragm bottom, which compensates for displacement of mercury in the column with varying pressure."
      ],
      "id": "en-Fortin_barometer-en-noun-uAelIZ7o",
      "wikipedia": [
        "Jean Nicolas Fortin"
      ]
    }
  ],
  "word": "Fortin barometer"
}

{
  "etymology_text": "Invented by Jean Nicolas Fortin.",
  "forms": [
    {
      "form": "Fortin barometers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Fortin barometer (plural Fortin barometers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A kind of barometer using a variable-displacement mercury cistern, usually constructed with a thumbscrew pressing on a leather diaphragm bottom, which compensates for displacement of mercury in the column with varying pressure."
      ],
      "wikipedia": [
        "Jean Nicolas Fortin"
      ]
    }
  ],
  "word": "Fortin barometer"
}