"somersault signal" meaning in English

{
  "forms": [
    {
      "form": "somersault signals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "somersault signal (plural somersault signals)",
      "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"
        },
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2020 November 18, Howard Johnston, “The missing 'Lincs' and the sole survivor”, in Rail, pages 58–59:",
          "text": "Realising their shortcomings, BR stripped out most of the smaller wayside stations between Peterborough and Grimsby on September 11 1961, although not those on the branches because there would have been nothing left to sustain them. Those that survived were working museums right to the end, with somersault signals and original interior fittings and signage.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A semaphore railway signal that is pivoted in the centre of its arm."
      ],
      "id": "en-somersault_signal-en-noun-AmStqeN5",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "semaphore",
          "semaphore"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "pivoted",
          "pivoted"
        ],
        [
          "arm",
          "arm"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A semaphore railway signal that is pivoted in the centre of its arm."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "somersault signal"
}

{
  "forms": [
    {
      "form": "somersault signals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "somersault signal (plural somersault signals)",
      "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",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "2020 November 18, Howard Johnston, “The missing 'Lincs' and the sole survivor”, in Rail, pages 58–59:",
          "text": "Realising their shortcomings, BR stripped out most of the smaller wayside stations between Peterborough and Grimsby on September 11 1961, although not those on the branches because there would have been nothing left to sustain them. Those that survived were working museums right to the end, with somersault signals and original interior fittings and signage.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A semaphore railway signal that is pivoted in the centre of its arm."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "semaphore",
          "semaphore"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "pivoted",
          "pivoted"
        ],
        [
          "arm",
          "arm"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A semaphore railway signal that is pivoted in the centre of its arm."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "somersault signal"
}