An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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convergent
  همگرا  
hamgerâ (#)
Fr.: convergent  

Coming together, as a light beam after passing through a convex lens which brings the beam into the focus.

See also: Verbal ddj. from → converge.