"Gardner gun" meaning in English

{
  "etymology_text": "Invented in 1874 by William Gardner of Toledo, Ohio.",
  "forms": [
    {
      "form": "Gardner guns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Gardner gun (plural Gardner guns)",
      "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"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
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          "source": "w"
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
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        }
      ],
      "glosses": [
        "An early mechanical machine gun operated by a crank."
      ],
      "id": "en-Gardner_gun-en-noun-x~Xw1dqc",
      "links": [
        [
          "mechanical",
          "mechanical"
        ],
        [
          "machine gun",
          "machine gun"
        ],
        [
          "crank",
          "crank"
        ]
      ],
      "wikipedia": [
        "Gardner gun"
      ]
    }
  ],
  "word": "Gardner gun"
}

{
  "etymology_text": "Invented in 1874 by William Gardner of Toledo, Ohio.",
  "forms": [
    {
      "form": "Gardner guns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Gardner gun (plural Gardner guns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "An early mechanical machine gun operated by a crank."
      ],
      "links": [
        [
          "mechanical",
          "mechanical"
        ],
        [
          "machine gun",
          "machine gun"
        ],
        [
          "crank",
          "crank"
        ]
      ],
      "wikipedia": [
        "Gardner gun"
      ]
    }
  ],
  "word": "Gardner gun"
}