An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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optical instrument
  سازالِ نوری  
sâzâl-e nuri
Fr.: instrument optique  

An instrument that either processes light waves to enhance an image or analyzes light waves to determine one of a number of characteristic properties.

See also: → optical; → instrument.