"Ludolphian number" meaning in English

{
  "etymology_text": "From Ludolph van Ceulen, a German mathematician who improved on previous approximations of pi.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "Ludolphian number (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1992 March 2, Richard Preston, “The Mountains of Pi”, in The New Yorker",
          "text": "Pi... came to be called the Ludolphian number, after Ludolph van Ceulen, a German mathematician who approximated it to thirty-five decimal places... a calculation that took Ludolph most of his life to accomplish, and gave him such satisfaction that he had the digits engraved on his tombstone... the stone vanished, possibly to be turned into a sidewalk slab. Somewhere in Leiden, people may be walking over Ludolph's digits.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Synonym of pi, particularly the 35-decimal approximation discovered by Ludolph van Ceulen"
      ],
      "id": "en-Ludolphian_number-en-noun-ngxioGf0",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "pi",
          "pi#English"
        ],
        [
          "particularly",
          "particularly"
        ],
        [
          "decimal",
          "decimal"
        ],
        [
          "approximation",
          "approximation"
        ],
        [
          "discover",
          "discover"
        ]
      ],
      "raw_glosses": [
        "(mathematics, chiefly historical) Synonym of pi, particularly the 35-decimal approximation discovered by Ludolph van Ceulen"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "pi"
        },
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "particularly the 35-decimal approximation discovered by Ludolph van Ceulen"
        }
      ],
      "tags": [
        "historical",
        "uncountable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Ludolphian number"
      ]
    }
  ],
  "word": "Ludolphian number"
}

{
  "etymology_text": "From Ludolph van Ceulen, a German mathematician who improved on previous approximations of pi.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "Ludolphian number (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with historical senses",
        "English terms with quotations",
        "English uncountable nouns",
        "en:Mathematics"
      ],
      "examples": [
        {
          "ref": "1992 March 2, Richard Preston, “The Mountains of Pi”, in The New Yorker",
          "text": "Pi... came to be called the Ludolphian number, after Ludolph van Ceulen, a German mathematician who approximated it to thirty-five decimal places... a calculation that took Ludolph most of his life to accomplish, and gave him such satisfaction that he had the digits engraved on his tombstone... the stone vanished, possibly to be turned into a sidewalk slab. Somewhere in Leiden, people may be walking over Ludolph's digits.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Synonym of pi, particularly the 35-decimal approximation discovered by Ludolph van Ceulen"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "pi",
          "pi#English"
        ],
        [
          "particularly",
          "particularly"
        ],
        [
          "decimal",
          "decimal"
        ],
        [
          "approximation",
          "approximation"
        ],
        [
          "discover",
          "discover"
        ]
      ],
      "raw_glosses": [
        "(mathematics, chiefly historical) Synonym of pi, particularly the 35-decimal approximation discovered by Ludolph van Ceulen"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "pi"
        },
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "particularly the 35-decimal approximation discovered by Ludolph van Ceulen"
        }
      ],
      "tags": [
        "historical",
        "uncountable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Ludolphian number"
      ]
    }
  ],
  "word": "Ludolphian number"
}