"hopper boy" meaning in English

{
  "etymology_text": "Derived from the occupation of boys who would carry out the task prior to the invention of the machine.",
  "forms": [
    {
      "form": "hopper boys",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hopper boy (plural hopper boys)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A rake in a mill, moving in a circle to spread meal for drying, and to draw it over an opening in the floor, through which it falls."
      ],
      "id": "en-hopper_boy-en-noun-FvxoGAR1",
      "links": [
        [
          "rake",
          "rake"
        ],
        [
          "mill",
          "mill"
        ],
        [
          "meal",
          "meal"
        ]
      ],
      "synonyms": [
        {
          "word": "hopperboy"
        }
      ]
    }
  ],
  "word": "hopper boy"
}

{
  "etymology_text": "Derived from the occupation of boys who would carry out the task prior to the invention of the machine.",
  "forms": [
    {
      "form": "hopper boys",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hopper boy (plural hopper boys)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A rake in a mill, moving in a circle to spread meal for drying, and to draw it over an opening in the floor, through which it falls."
      ],
      "links": [
        [
          "rake",
          "rake"
        ],
        [
          "mill",
          "mill"
        ],
        [
          "meal",
          "meal"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "hopperboy"
    }
  ],
  "word": "hopper boy"
}