An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Froude number
  عدد ِ فرود  
adad-e Froude
Fr.: nombre de Froude  

A → dimensionless number that gives the ratio of local acceleration to gravitational acceleration in the vertical.

See also: Named after William Froude (1810-1879), English engineer.