"millcake" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mill",
        "3": "cake"
      },
      "expansion": "mill + cake",
      "name": "compound"
    }
  ],
  "etymology_text": "From mill + cake.",
  "forms": [
    {
      "form": "millcakes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "millcake (plural millcakes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
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          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
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          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "The solid residue left from the extraction of linseed oil from flax seeds; used as feed for cattle."
      ],
      "id": "en-millcake-en-noun-U7cjvZa4",
      "links": [
        [
          "residue",
          "residue"
        ],
        [
          "extraction",
          "extraction"
        ],
        [
          "linseed oil",
          "linseed oil"
        ],
        [
          "flax",
          "flax"
        ],
        [
          "seed",
          "seed"
        ],
        [
          "feed",
          "feed"
        ],
        [
          "cattle",
          "cattle"
        ]
      ]
    }
  ],
  "word": "millcake"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mill",
        "3": "cake"
      },
      "expansion": "mill + cake",
      "name": "compound"
    }
  ],
  "etymology_text": "From mill + cake.",
  "forms": [
    {
      "form": "millcakes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "millcake (plural millcakes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "The solid residue left from the extraction of linseed oil from flax seeds; used as feed for cattle."
      ],
      "links": [
        [
          "residue",
          "residue"
        ],
        [
          "extraction",
          "extraction"
        ],
        [
          "linseed oil",
          "linseed oil"
        ],
        [
          "flax",
          "flax"
        ],
        [
          "seed",
          "seed"
        ],
        [
          "feed",
          "feed"
        ],
        [
          "cattle",
          "cattle"
        ]
      ]
    }
  ],
  "word": "millcake"
}