An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک



hyperbolic sine
  سینوس ِ هذلولی  
sinus-e hozluli
Fr.: sinus hyperbolique  

A function, denoted cosh x, defined for all real values of x, by the relation: cosh x = (1/2) (ex - e-x).

See also:hyperbolic; → sine.