"phlogisticated air" meaning in English

{
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        "1": "-"
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      "expansion": "phlogisticated air (uncountable)",
      "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"
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          "source": "w"
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          "kind": "topical",
          "langcode": "en",
          "name": "Chemistry",
          "orig": "en:Chemistry",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nitrogen",
          "orig": "en:Nitrogen",
          "parents": [
            "Pnictogens",
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
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          "source": "w"
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          "kind": "other",
          "langcode": "en",
          "name": "Obsolete scientific theories",
          "orig": "en:Obsolete scientific theories",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "dephlogisticated air"
        }
      ],
      "glosses": [
        "nitrogen gas"
      ],
      "id": "en-phlogisticated_air-en-noun-NRsZPOtk",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "nitrogen",
          "nitrogen"
        ],
        [
          "gas",
          "gas"
        ]
      ],
      "raw_glosses": [
        "(chemistry, obsolete) nitrogen gas"
      ],
      "synonyms": [
        {
          "word": "phlogisticated gas"
        }
      ],
      "tags": [
        "obsolete",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "phlogisticated air"
}

{
  "derived": [
    {
      "word": "dephlogisticated air"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
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      "expansion": "phlogisticated air (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with obsolete senses",
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        "en:Chemistry",
        "en:Nitrogen",
        "en:Obsolete scientific theories"
      ],
      "glosses": [
        "nitrogen gas"
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "nitrogen",
          "nitrogen"
        ],
        [
          "gas",
          "gas"
        ]
      ],
      "raw_glosses": [
        "(chemistry, obsolete) nitrogen gas"
      ],
      "tags": [
        "obsolete",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "phlogisticated gas"
    }
  ],
  "word": "phlogisticated air"
}