An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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dihedral angle
  زاویه‌ی ِ دودیمی  
zâviye-ye dodimi
Fr.: angle dièdre  

An angle formed by two planes meeting along a common line. Compare with → face angle.

See also: → angle; → dihedral.