An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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doubly convex
  دو-کوژ  
do-kuž
Fr.: double-convexe  

Describing a → lens which is → convex on both sides.

See also: → doubly; → convex.