An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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empirical formula
  دیسول ِ آروینی  
disul-e ârvini
Fr.: formule empirique  
  1. In physics, a mathematical equation that predicts observed results, but has no known theoretical basis to explain why it works.
  2. In chemistry, a simple expression of the relative number of each type of atom in a chemical compound.

See also: → empirical; → formula