"airometer" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "air",
        "3": "-o-",
        "4": "-meter"
      },
      "expansion": "air + -o- + -meter",
      "name": "af"
    }
  ],
  "etymology_text": "air + -o- + -meter",
  "forms": [
    {
      "form": "airometers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "airometer (plural airometers)",
      "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": "other",
          "name": "English terms interfixed with -o-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -meter",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A hollow cylinder to contain air. It is closed above and open below, and has its open end plunged into water."
      ],
      "id": "en-airometer-en-noun-T8y8t4pZ",
      "links": [
        [
          "hollow",
          "hollow"
        ],
        [
          "cylinder",
          "cylinder"
        ],
        [
          "air",
          "air"
        ]
      ],
      "related": [
        {
          "word": "aerometer"
        }
      ]
    }
  ],
  "word": "airometer"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "air",
        "3": "-o-",
        "4": "-meter"
      },
      "expansion": "air + -o- + -meter",
      "name": "af"
    }
  ],
  "etymology_text": "air + -o- + -meter",
  "forms": [
    {
      "form": "airometers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "airometer (plural airometers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "aerometer"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms interfixed with -o-",
        "English terms suffixed with -meter"
      ],
      "glosses": [
        "A hollow cylinder to contain air. It is closed above and open below, and has its open end plunged into water."
      ],
      "links": [
        [
          "hollow",
          "hollow"
        ],
        [
          "cylinder",
          "cylinder"
        ],
        [
          "air",
          "air"
        ]
      ]
    }
  ],
  "word": "airometer"
}