"Tipler cylinder" meaning in English

{
  "etymology_text": "Named after American physicist Frank J. Tipler, who recognized the possibility of such a device in 1974.",
  "forms": [
    {
      "form": "Tipler cylinders",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "Tipler cylinder (plural Tipler cylinders)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "English entries with incorrect language header",
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        {
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          "name": "Megastructures",
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          "orig": "en:Time travel",
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            "Fiction",
            "Speculative fiction",
            "All topics",
            "Human activity",
            "Transport",
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            "Human behaviour",
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      ],
      "glosses": [
        "A hypothetical massive, infinitely long cylinder spinning along its longitudinal axis, enabling time travel."
      ],
      "id": "en-Tipler_cylinder-en-noun-EJiHlCuZ",
      "links": [
        [
          "axis",
          "axis"
        ],
        [
          "time travel",
          "time travel"
        ]
      ],
      "synonyms": [
        {
          "word": "Tipler machine"
        },
        {
          "word": "Tipler time machine"
        }
      ],
      "wikipedia": [
        "Frank J. Tipler",
        "Tipler cylinder"
      ]
    }
  ],
  "word": "Tipler cylinder"
}

{
  "etymology_text": "Named after American physicist Frank J. Tipler, who recognized the possibility of such a device in 1974.",
  "forms": [
    {
      "form": "Tipler cylinders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      },
      "expansion": "Tipler cylinder (plural Tipler cylinders)",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Time travel"
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      "glosses": [
        "A hypothetical massive, infinitely long cylinder spinning along its longitudinal axis, enabling time travel."
      ],
      "links": [
        [
          "axis",
          "axis"
        ],
        [
          "time travel",
          "time travel"
        ]
      ],
      "wikipedia": [
        "Frank J. Tipler",
        "Tipler cylinder"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Tipler machine"
    },
    {
      "word": "Tipler time machine"
    }
  ],
  "word": "Tipler cylinder"
}