An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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polar coordinates
  هم‌آراهای ِ قطبی  
hamârâhâ-ye qotbi (#)
Fr.: coordonnées polaires  

A coordinate system in which the position of any point (M) in a plane is specified by two coordinates: 1) ρ, which expresses the distance from a fixed point (the pole, denoted O), and 2) the number φ, which is the angle formed by
the line segment OM and a fixed reference line passing through the pole.

See also: → polar; → coordinate.