"diesel exhaust fluid" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "diesel exhaust",
        "3": "fluid"
      },
      "expansion": "diesel exhaust + fluid",
      "name": "compound"
    },
    {
      "args": {
        "1": "en",
        "2": "exhaust"
      },
      "expansion": "exhaust",
      "name": "l"
    },
    {
      "args": {
        "1": "en",
        "2": "diesel"
      },
      "expansion": "diesel",
      "name": "l"
    },
    {
      "args": {
        "1": "en",
        "2": "internal combustion engine",
        "3": "internal combustion engines"
      },
      "expansion": "internal combustion engines",
      "name": "l"
    }
  ],
  "etymology_text": "diesel exhaust + fluid. From being a liquid, which is a class of fluid, used for the treatment of the exhaust from diesel internal combustion engines",
  "forms": [
    {
      "form": "diesel exhaust fluids",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "diesel exhaust fluid (plural diesel exhaust fluids)",
      "name": "en-noun"
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  "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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          "langcode": "en",
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          "orig": "en:Automotive",
          "parents": [
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            "All topics",
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          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "DEF"
        }
      ],
      "glosses": [
        "A liquid used to reduce controlled emissions from the exhaust of diesel engines"
      ],
      "hypernyms": [
        {
          "word": "liquid"
        },
        {
          "word": "fluid"
        }
      ],
      "id": "en-diesel_exhaust_fluid-en-noun-1-AW8io-",
      "links": [
        [
          "automotive",
          "automotive"
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        [
          "liquid",
          "liquid#English"
        ],
        [
          "emissions",
          "emission#English"
        ],
        [
          "diesel engines",
          "diesel engine#English"
        ]
      ],
      "raw_glosses": [
        "(automotive) A liquid used to reduce controlled emissions from the exhaust of diesel engines"
      ],
      "related": [
        {
          "word": "diesel"
        },
        {
          "word": "diesel exhaust"
        },
        {
          "word": "exhaust"
        },
        {
          "word": "exhaust fluid"
        },
        {
          "word": "fluid"
        }
      ],
      "synonyms": [
        {
          "word": "DEF"
        }
      ],
      "topics": [
        "automotive",
        "transport",
        "vehicles"
      ],
      "wikipedia": [
        "en:diesel exhaust fluid"
      ]
    }
  ],
  "word": "diesel exhaust fluid"
}

{
  "derived": [
    {
      "word": "DEF"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "diesel exhaust",
        "3": "fluid"
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      "expansion": "diesel exhaust + fluid",
      "name": "compound"
    },
    {
      "args": {
        "1": "en",
        "2": "exhaust"
      },
      "expansion": "exhaust",
      "name": "l"
    },
    {
      "args": {
        "1": "en",
        "2": "diesel"
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      "expansion": "diesel",
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        "2": "internal combustion engine",
        "3": "internal combustion engines"
      },
      "expansion": "internal combustion engines",
      "name": "l"
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  ],
  "etymology_text": "diesel exhaust + fluid. From being a liquid, which is a class of fluid, used for the treatment of the exhaust from diesel internal combustion engines",
  "forms": [
    {
      "form": "diesel exhaust fluids",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "diesel exhaust fluid (plural diesel exhaust fluids)",
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  "hypernyms": [
    {
      "word": "liquid"
    },
    {
      "word": "fluid"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "diesel"
    },
    {
      "word": "diesel exhaust"
    },
    {
      "word": "exhaust"
    },
    {
      "word": "exhaust fluid"
    },
    {
      "word": "fluid"
    }
  ],
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      ],
      "glosses": [
        "A liquid used to reduce controlled emissions from the exhaust of diesel engines"
      ],
      "links": [
        [
          "automotive",
          "automotive"
        ],
        [
          "liquid",
          "liquid#English"
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        ],
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      "raw_glosses": [
        "(automotive) A liquid used to reduce controlled emissions from the exhaust of diesel engines"
      ],
      "topics": [
        "automotive",
        "transport",
        "vehicles"
      ],
      "wikipedia": [
        "en:diesel exhaust fluid"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "DEF"
    }
  ],
  "word": "diesel exhaust fluid"
}