An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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aleph
  الف  
alef (#)
Fr.: aleph  

  1. The first letter of the Hebrew alphabet (ℵ).

  2. A → cardinal number representing an uncountable set. For example, ℵ0 (pronounced aleph-null, aleph-nought, or aleph-zero) is the smallest infinite cardinal and ℵ1 is the smallest cadinal larger than ℵ0.

See also: Hebrew and Phoenician letter, from Semitic languages.