An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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well-formed formula (wff)
  دیسول ِ خوش‌دیسه (wff)  
disul-e xošdisé (wff)
Fr.: formule bien formée (FBF)  

A string of → symbols from the alphabet of the → formal language that conforms to the grammar of the formal language. → closed wff, → open wff.

See also: Wff, pronounced whiff; → well; → form; → formula.