"feeder head" meaning in English

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      "expansion": "feeder head (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Metalworking",
          "orig": "en:Metalworking",
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            "Crafts",
            "Metallurgy",
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      ],
      "glosses": [
        "a live open riser with a hot ceramic liner, designed to counteract the formation of harmful hollows when casting objects of materials such as metals into molds."
      ],
      "id": "en-feeder_head-en-noun-VJ1T~tz7",
      "links": [
        [
          "ceramic",
          "ceramic"
        ],
        [
          "liner",
          "liner"
        ],
        [
          "design",
          "design"
        ],
        [
          "counteract",
          "counteract"
        ],
        [
          "casting",
          "casting"
        ]
      ],
      "qualifier": "Casting (metalworking)",
      "raw_glosses": [
        "(Casting (metalworking)) a live open riser with a hot ceramic liner, designed to counteract the formation of harmful hollows when casting objects of materials such as metals into molds."
      ],
      "synonyms": [
        {
          "word": "dozzle"
        },
        {
          "word": "hot top"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "feeder head"
}

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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "a live open riser with a hot ceramic liner, designed to counteract the formation of harmful hollows when casting objects of materials such as metals into molds."
      ],
      "links": [
        [
          "ceramic",
          "ceramic"
        ],
        [
          "liner",
          "liner"
        ],
        [
          "design",
          "design"
        ],
        [
          "counteract",
          "counteract"
        ],
        [
          "casting",
          "casting"
        ]
      ],
      "qualifier": "Casting (metalworking)",
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        "(Casting (metalworking)) a live open riser with a hot ceramic liner, designed to counteract the formation of harmful hollows when casting objects of materials such as metals into molds."
      ],
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        "uncountable"
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  "synonyms": [
    {
      "word": "dozzle"
    },
    {
      "word": "hot top"
    }
  ],
  "word": "feeder head"
}