"Terrell rotation" meaning in English

{
  "forms": [
    {
      "form": "Terrell rotations",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "Terrell rotation (countable and uncountable, plural Terrell rotations)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Relativity",
          "orig": "en:Relativity",
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            "Physics",
            "Sciences",
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            "Fundamental"
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        }
      ],
      "glosses": [
        "The visual distortion (resembling a rotation) that a passing object travelling at a significant fraction of the speed of light exhibits."
      ],
      "id": "en-Terrell_rotation-en-noun-vwbHAXHn",
      "links": [
        [
          "relativity",
          "relativity"
        ]
      ],
      "qualifier": "relativity",
      "raw_glosses": [
        "(relativity) The visual distortion (resembling a rotation) that a passing object travelling at a significant fraction of the speed of light exhibits."
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "Terrell rotation"
}

{
  "forms": [
    {
      "form": "Terrell rotations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
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      "expansion": "Terrell rotation (countable and uncountable, plural Terrell rotations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
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      "glosses": [
        "The visual distortion (resembling a rotation) that a passing object travelling at a significant fraction of the speed of light exhibits."
      ],
      "links": [
        [
          "relativity",
          "relativity"
        ]
      ],
      "qualifier": "relativity",
      "raw_glosses": [
        "(relativity) The visual distortion (resembling a rotation) that a passing object travelling at a significant fraction of the speed of light exhibits."
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "Terrell rotation"
}