"planigon" meaning in English

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  "etymology_text": "? plane + -gon",
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      "form": "planigons",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Polygons",
          "orig": "en:Polygons",
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            "Geometry",
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          "name": "Tesselation",
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      "glosses": [
        "A convex polygon that can fill the plane with only copies of itself."
      ],
      "id": "en-planigon-en-noun-stb20ciL",
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          "geometry"
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          "plane",
          "plane"
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      "raw_glosses": [
        "(geometry) A convex polygon that can fill the plane with only copies of itself."
      ],
      "related": [
        {
          "sense": "the three-dimensional case",
          "word": "stereohedron"
        }
      ],
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        "geometry",
        "mathematics",
        "sciences"
      ],
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  "etymology_text": "? plane + -gon",
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    {
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  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "sense": "the three-dimensional case",
      "word": "stereohedron"
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        "A convex polygon that can fill the plane with only copies of itself."
      ],
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        "(geometry) A convex polygon that can fill the plane with only copies of itself."
      ],
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        "geometry",
        "mathematics",
        "sciences"
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