Bible Encyclopedias
Cipher
1911 Encyclopedia Britannica
or Cypher (from Arab. sifr, void), the symbol o, nought, or zero; and so a name for symbolic or secret writing (see Cryptography), or even for shorthand, and also in elementary education for doing simple sums ("ciphering").
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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Cipher'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/c/cipher.html. 1910.