"pit-eye" meaning in English

{
  "forms": [
    {
      "form": "pit-eyes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pit-eye (plural pit-eyes)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "1888, Rudyard Kipling, ‘At Twenty-two’, In Black and White, Folio Society, published 2005, page 402:",
          "text": "The cages came up crammed and crammed again with the men nearest the pit-eye, as they call the place where you can see daylight from the bottom of the main shaft.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The bottom of a central mineshaft."
      ],
      "id": "en-pit-eye-en-noun-Ad7YSvHa",
      "links": [
        [
          "mineshaft",
          "mineshaft"
        ]
      ],
      "synonyms": [
        {
          "word": "pit eye"
        }
      ]
    }
  ],
  "word": "pit-eye"
}

{
  "forms": [
    {
      "form": "pit-eyes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pit-eye (plural pit-eyes)",
      "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",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1888, Rudyard Kipling, ‘At Twenty-two’, In Black and White, Folio Society, published 2005, page 402:",
          "text": "The cages came up crammed and crammed again with the men nearest the pit-eye, as they call the place where you can see daylight from the bottom of the main shaft.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The bottom of a central mineshaft."
      ],
      "links": [
        [
          "mineshaft",
          "mineshaft"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "pit eye"
    }
  ],
  "word": "pit-eye"
}