"threadmill" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "thread",
        "3": "mill"
      },
      "expansion": "thread + mill",
      "name": "compound"
    }
  ],
  "etymology_text": "* thread + mill",
  "forms": [
    {
      "form": "threadmills",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "threadmill (plural threadmills)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "69 31",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w+disamb"
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          "_dis": "90 10",
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          "name": "Pages with entries",
          "parents": [],
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      ],
      "glosses": [
        "A factory or machine specialized in the manufacture of thread."
      ],
      "id": "en-threadmill-en-noun-I~yxL77g",
      "links": [
        [
          "thread",
          "thread"
        ]
      ]
    },
    {
      "glosses": [
        "A machine for cutting threads as for fastening pipes, for receiving screws, tool bits, etc."
      ],
      "id": "en-threadmill-en-noun-cFmDtCy1",
      "synonyms": [
        {
          "_dis1": "36 64",
          "sense": "machine for cutting threads",
          "word": "thread miller"
        }
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "thread mill"
    }
  ],
  "word": "threadmill"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "thread",
        "3": "mill"
      },
      "expansion": "thread + mill",
      "name": "compound"
    }
  ],
  "etymology_text": "* thread + mill",
  "forms": [
    {
      "form": "threadmills",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "threadmill (plural threadmills)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "A factory or machine specialized in the manufacture of thread."
      ],
      "links": [
        [
          "thread",
          "thread"
        ]
      ]
    },
    {
      "glosses": [
        "A machine for cutting threads as for fastening pipes, for receiving screws, tool bits, etc."
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "machine for cutting threads",
      "word": "thread miller"
    },
    {
      "word": "thread mill"
    }
  ],
  "word": "threadmill"
}