"fixed oil" meaning in English

{
  "forms": [
    {
      "form": "fixed oils",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fixed oil (plural fixed oils)",
      "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": "topical",
          "langcode": "en",
          "name": "Fats and oils",
          "orig": "en:Fats and oils",
          "parents": [
            "Foods",
            "Eating",
            "Food and drink",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Liquids",
          "orig": "en:Liquids",
          "parents": [
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A non-volatile oil produced from animals or plants."
      ],
      "id": "en-fixed_oil-en-noun-tM66E4sa",
      "links": [
        [
          "volatile",
          "volatile"
        ],
        [
          "oil",
          "oil"
        ],
        [
          "animal",
          "animal"
        ],
        [
          "plant",
          "plant"
        ]
      ],
      "related": [
        {
          "word": "essential oil"
        }
      ],
      "synonyms": [
        {
          "word": "fatty oil"
        }
      ]
    }
  ],
  "word": "fixed oil"
}

{
  "forms": [
    {
      "form": "fixed oils",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fixed oil (plural fixed oils)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "essential oil"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Fats and oils",
        "en:Liquids"
      ],
      "glosses": [
        "A non-volatile oil produced from animals or plants."
      ],
      "links": [
        [
          "volatile",
          "volatile"
        ],
        [
          "oil",
          "oil"
        ],
        [
          "animal",
          "animal"
        ],
        [
          "plant",
          "plant"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "fatty oil"
    }
  ],
  "word": "fixed oil"
}