"Martello tower" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "co",
        "3": "w:Torra di Mortella",
        "lit": "Tower of Mortella"
      },
      "expansion": "Corsican Torra di Mortella (literally “Tower of Mortella”)",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "it",
        "3": "martello",
        "4": "",
        "5": "hammer"
      },
      "expansion": "Italian martello (“hammer”)",
      "name": "der"
    }
  ],
  "etymology_text": "From a corruption of Corsican Torra di Mortella (literally “Tower of Mortella”), a tower in Corsica which was used as the basis for the design; possibly influenced by Italian martello (“hammer”).",
  "forms": [
    {
      "form": "Martello towers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Martello tower (plural Martello towers)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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      "examples": [
        {
          "ref": "1974, GB Edwards, The Book of Ebenezer Le Page, New York, published 2007, page 309",
          "text": "The martello towers was put up for the Guernsey people to get in out of the way of the Grand Saracen.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A short sturdy round masonry fort, especially one constructed at various coastal points in the British Empire during the Napoleonic Wars."
      ],
      "id": "en-Martello_tower-en-noun-AsvPMrLY",
      "links": [
        [
          "short",
          "short"
        ],
        [
          "sturdy",
          "sturdy"
        ],
        [
          "masonry",
          "masonry"
        ],
        [
          "fort",
          "fort"
        ],
        [
          "coastal",
          "coastal"
        ],
        [
          "British Empire",
          "British Empire"
        ]
      ],
      "synonyms": [
        {
          "word": "Martello"
        }
      ],
      "wikipedia": [
        "Martello tower"
      ]
    }
  ],
  "word": "Martello tower"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "co",
        "3": "w:Torra di Mortella",
        "lit": "Tower of Mortella"
      },
      "expansion": "Corsican Torra di Mortella (literally “Tower of Mortella”)",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "it",
        "3": "martello",
        "4": "",
        "5": "hammer"
      },
      "expansion": "Italian martello (“hammer”)",
      "name": "der"
    }
  ],
  "etymology_text": "From a corruption of Corsican Torra di Mortella (literally “Tower of Mortella”), a tower in Corsica which was used as the basis for the design; possibly influenced by Italian martello (“hammer”).",
  "forms": [
    {
      "form": "Martello towers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Martello tower (plural Martello towers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
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        "English terms derived from Italian",
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      "examples": [
        {
          "ref": "1974, GB Edwards, The Book of Ebenezer Le Page, New York, published 2007, page 309",
          "text": "The martello towers was put up for the Guernsey people to get in out of the way of the Grand Saracen.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A short sturdy round masonry fort, especially one constructed at various coastal points in the British Empire during the Napoleonic Wars."
      ],
      "links": [
        [
          "short",
          "short"
        ],
        [
          "sturdy",
          "sturdy"
        ],
        [
          "masonry",
          "masonry"
        ],
        [
          "fort",
          "fort"
        ],
        [
          "coastal",
          "coastal"
        ],
        [
          "British Empire",
          "British Empire"
        ]
      ],
      "wikipedia": [
        "Martello tower"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Martello"
    }
  ],
  "word": "Martello tower"
}