"perfluorooctane" meaning in English

{
  "forms": [
    {
      "form": "perfluorooctanes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
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      "expansion": "perfluorooctane (countable and uncountable, plural perfluorooctanes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
        },
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          "kind": "topical",
          "langcode": "en",
          "name": "Organic compounds",
          "orig": "en:Organic compounds",
          "parents": [
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          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "perfluorooctane sulfonate"
        }
      ],
      "glosses": [
        "A derivative of octane, C₈F₁₈, in which every hydrogen atom has been replaced by those of fluorine"
      ],
      "id": "en-perfluorooctane-en-noun-4770kmTK",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "octane",
          "octane"
        ],
        [
          "hydrogen",
          "hydrogen"
        ],
        [
          "fluorine",
          "fluorine"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) A derivative of octane, C₈F₁₈, in which every hydrogen atom has been replaced by those of fluorine"
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "perfluorooctane"
}

{
  "derived": [
    {
      "word": "perfluorooctane sulfonate"
    }
  ],
  "forms": [
    {
      "form": "perfluorooctanes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
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      "expansion": "perfluorooctane (countable and uncountable, plural perfluorooctanes)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English uncountable nouns",
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      ],
      "glosses": [
        "A derivative of octane, C₈F₁₈, in which every hydrogen atom has been replaced by those of fluorine"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "octane",
          "octane"
        ],
        [
          "hydrogen",
          "hydrogen"
        ],
        [
          "fluorine",
          "fluorine"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) A derivative of octane, C₈F₁₈, in which every hydrogen atom has been replaced by those of fluorine"
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "perfluorooctane"
}