Cifraとは 意味・読み方・使い方

語源

Borrowed from Arabic صِفْر (ṣifr, “zero, empty, nothing”). Doublet of zēphirum (“zero”).

発音

• (Classical Latin) IPA: [ˈkiː.fra]
• (modern Italianate Ecclesiastical) IPA: [ˈt͡ʃiː.fra]

名詞

cīfra f (genitive cīfrae); first declension (Medieval Latin)

1. numeral, cipher
2. zero (symbol)
   • c. 1230, Johannes de Sacrobosco, “De Arte Numerandi”, in Rara Mathematica‎, published 1841, page 3:

     Decima figura dicitur theta, vel circulus, vel cifra, vel figura nihili quia nihil significat, sed locum tenens dat aliis significare: nam sine cifra vel cifris purus non potest scribi articulus.

     The tenth symbol is called theta, or circle, or zero, or the null symbol, which indicates none, but, holding a place, gives a different meaning: for without a zero or zeroes, it is not possible to write the pure single word.

語形変化

First-declension noun.

関連する語

• zēphirum n

派生した語

• English: cipher
• French: chiffre
• Friulian: cifre
• Hungarian: cifra
• Italian: cifra
• Piedmontese: cifra

参照

• cifra in Ramminger, Johann (16 July 2016 (last accessed)), Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700‎, pre-publication website, 2005-2016