An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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phase difference
  دگرسانی ِ فاز  
degarsâni-ye fâz
Fr.: différence de phase  

The difference of phase (usually expressed as a time or an angle) between two periodic quantities which vary sinusoidally and have the same frequency.

See also: → phase; → difference.