"precooler" meaning in English

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  "etymology_text": "From pre- + cool + -er.",
  "forms": [
    {
      "form": "precoolers",
      "tags": [
        "plural"
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  "head_templates": [
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      "expansion": "precooler (plural precoolers)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "_dis1": "0 0",
      "word": "cool"
    },
    {
      "_dis1": "0 0",
      "word": "cooler"
    },
    {
      "_dis1": "0 0",
      "word": "precool"
    },
    {
      "_dis1": "0 0",
      "word": "aftercooler"
    },
    {
      "_dis1": "0 0",
      "word": "intercooler"
    }
  ],
  "senses": [
    {
      "glosses": [
        "A device that precools things before they are placed into a cooler or fridge."
      ],
      "id": "en-precooler-en-noun-gq~omEq9",
      "links": [
        [
          "precool",
          "precool"
        ],
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          "cooler",
          "cooler"
        ],
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          "fridge",
          "fridge"
        ]
      ]
    },
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          "orig": "en:Aviation",
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      ],
      "glosses": [
        "A device which cools the incoming airstream prior to its introduction into the combustion chamber or compressor."
      ],
      "id": "en-precooler-en-noun-4OLd1ZaR",
      "links": [
        [
          "aviation",
          "aviation"
        ],
        [
          "combustion chamber",
          "combustion chamber"
        ],
        [
          "compressor",
          "compressor"
        ]
      ],
      "raw_glosses": [
        "(aviation) A device which cools the incoming airstream prior to its introduction into the combustion chamber or compressor."
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "aviation",
        "business",
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  ],
  "word": "precooler"
}

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      "name": "confix"
    }
  ],
  "etymology_text": "From pre- + cool + -er.",
  "forms": [
    {
      "form": "precoolers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "precooler (plural precoolers)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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    {
      "word": "cool"
    },
    {
      "word": "cooler"
    },
    {
      "word": "precool"
    },
    {
      "word": "aftercooler"
    },
    {
      "word": "intercooler"
    }
  ],
  "senses": [
    {
      "glosses": [
        "A device that precools things before they are placed into a cooler or fridge."
      ],
      "links": [
        [
          "precool",
          "precool"
        ],
        [
          "cooler",
          "cooler"
        ],
        [
          "fridge",
          "fridge"
        ]
      ]
    },
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        "en:Aviation"
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        "A device which cools the incoming airstream prior to its introduction into the combustion chamber or compressor."
      ],
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          "aviation",
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          "combustion chamber",
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        "(aviation) A device which cools the incoming airstream prior to its introduction into the combustion chamber or compressor."
      ],
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        "aerospace",
        "aviation",
        "business",
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  ],
  "word": "precooler"
}