"toggle iron" meaning in English

{
  "etymology_text": "From the resemblance of the pivoted crosspiece to a toggle.",
  "forms": [
    {
      "form": "toggle irons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "toggle iron (plural toggle irons)",
      "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 harpoon with one or more pivoted crosspieces in a mortise near the point to prevent it from being drawn out when a whale, shark, or other animal, is harpooned."
      ],
      "id": "en-toggle_iron-en-noun-LzyOxQCQ",
      "links": [
        [
          "harpoon",
          "harpoon"
        ],
        [
          "crosspiece",
          "crosspiece"
        ],
        [
          "mortise",
          "mortise"
        ]
      ]
    }
  ],
  "word": "toggle iron"
}

{
  "etymology_text": "From the resemblance of the pivoted crosspiece to a toggle.",
  "forms": [
    {
      "form": "toggle irons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "toggle iron (plural toggle irons)",
      "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 harpoon with one or more pivoted crosspieces in a mortise near the point to prevent it from being drawn out when a whale, shark, or other animal, is harpooned."
      ],
      "links": [
        [
          "harpoon",
          "harpoon"
        ],
        [
          "crosspiece",
          "crosspiece"
        ],
        [
          "mortise",
          "mortise"
        ]
      ]
    }
  ],
  "word": "toggle iron"
}