An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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geodetic zenith
  سرسوی ِ زمین‌سنجیک  
sarsu-ye zamin-sanjik
Fr.: zénith géodésique  

The intersection of the prolongation of the outward → normal to the → reference ellipsoid at the point in question with the → celestial sphere.

See also: → geodetic; → zenith.