"vigentennial" meaning in English

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      "name": "en-adj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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          "ref": "2005, D. Brett King, Michael Wertheimer, Max Wertheimer and Gestalt Theory, page 83:",
          "text": "Jung strongly identified with the word-association experiments and chose to lecture on that work at the September, 1909 vigentennial celebration of the founding of Clark University at Worcester, Massachusetts […]",
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      ],
      "glosses": [
        "Relating to a period of twenty years."
      ],
      "id": "en-vigentennial-en-adj-tuzLd8nd",
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          "twenty",
          "twenty"
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          "year",
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  "word": "vigentennial"
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      "expansion": "vigentennial (not comparable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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        {
          "ref": "2005, D. Brett King, Michael Wertheimer, Max Wertheimer and Gestalt Theory, page 83:",
          "text": "Jung strongly identified with the word-association experiments and chose to lecture on that work at the September, 1909 vigentennial celebration of the founding of Clark University at Worcester, Massachusetts […]",
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        "Relating to a period of twenty years."
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  "word": "vigentennial"
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