Ludolfzahl
German
Etymology
Ludolf (“Ludolph”) + Zahl (“number”) (an irrational constant named after mathematian Ludolph van Ceulen (1540-1610))
Pronunciation
- IPA(key): [ˈluːdɔlfˌtsaːl]
- Hyphenation: Lu‧dolf‧zahl
Proper noun
Ludolfzahl f (genitive Ludolfzahl, no plural)
- (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
Declension of Ludolfzahl [sg-only, feminine]
| singular | |||
|---|---|---|---|
| indef. | def. | noun | |
| nominative | eine | die | Ludolfzahl |
| genitive | einer | der | Ludolfzahl |
| dative | einer | der | Ludolfzahl |
| accusative | eine | die | Ludolfzahl |
Further reading
- “Ludolfzahl” in Digitales Wörterbuch der deutschen Sprache
- “Ludolfzahl” in Duden online
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