Kreiszahl

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German

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German Wikipedia has an article on:
Wikipedia de

Etymology

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Kreis (“circle”) +‎ Zahl (“number”)

Pronunciation

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  • IPA(key): /ˈkraɪ̯sˌtsaːl/
  • Audio:(file)
  • Hyphenation: Kreis‧zahl

Noun

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Kreiszahl f (genitive Kreiszahl, no plural)

  1. (mathematics) 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, ludolfsche Zahl, Ludolfzahl

Declension

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Declension of Kreiszahl [sg-only, feminine]
singular
indef. def. noun
nominative eine die Kreiszahl
genitive einer der Kreiszahl
dative einer der Kreiszahl
accusative eine die Kreiszahl

Further reading

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  • “Kreiszahl” in Digitales Wörterbuch der deutschen Sprache
  • “Kreiszahl” in Uni Leipzig: Wortschatz-Lexikon
  • “Kreiszahl” in Duden online
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