German

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Etymology

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Ludolf (Ludolph) +‎ Zahl (number) (an irrational constant named after mathematian Ludolph van Ceulen (1540-1610))

Pronunciation

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  • IPA(key): [ˈluːdɔlfˌtsaːl]
  • Hyphenation: Lu‧dolf‧zahl

Proper noun

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Ludolfzahl f (genitive Ludolfzahl, no plural)

  1. (mathematics) Ludolph's number or Ludolphine number: the number π (an irrational constant representing the ratio of a circle's circumference to its diameter in Euclidean geometry; approximately 3.14159...,)
    Synonyms: π, Pi, Archimedes-Konstante, Kreiskonstante, Kreiszahl, ludolfsche Zahl

Declension

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Further reading

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