"Hilbert curve" meaning in English

{
  "etymology_text": "First described by the German mathematician David Hilbert in 1891.",
  "forms": [
    {
      "form": "Hilbert curves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Hilbert curve (plural Hilbert curves)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Curves",
          "orig": "en:Curves",
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            "Mathematics",
            "Formal sciences",
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Geometry",
          "orig": "en:Geometry",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A continuous fractal space-filling curve."
      ],
      "id": "en-Hilbert_curve-en-noun-59yJtTRu",
      "links": [
        [
          "geometry",
          "geometry"
        ],
        [
          "continuous",
          "continuous"
        ],
        [
          "fractal",
          "fractal"
        ],
        [
          "space-filling curve",
          "space-filling curve"
        ]
      ],
      "raw_glosses": [
        "(geometry) A continuous fractal space-filling curve."
      ],
      "topics": [
        "geometry",
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Hilbert curve"
      ]
    }
  ],
  "word": "Hilbert curve"
}

{
  "etymology_text": "First described by the German mathematician David Hilbert in 1891.",
  "forms": [
    {
      "form": "Hilbert curves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Hilbert curve (plural Hilbert curves)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
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        "English multiword terms",
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        "Pages with entries",
        "en:Curves",
        "en:Geometry"
      ],
      "glosses": [
        "A continuous fractal space-filling curve."
      ],
      "links": [
        [
          "geometry",
          "geometry"
        ],
        [
          "continuous",
          "continuous"
        ],
        [
          "fractal",
          "fractal"
        ],
        [
          "space-filling curve",
          "space-filling curve"
        ]
      ],
      "raw_glosses": [
        "(geometry) A continuous fractal space-filling curve."
      ],
      "topics": [
        "geometry",
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Hilbert curve"
      ]
    }
  ],
  "word": "Hilbert curve"
}