An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian
فرهنگ ریشهشناختی اخترشناسی-اخترفیزیک
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ray of class 2
پرتو ِ ردهی ِ ۲
partw-e rade-ye 2
Fr.: rayon de classe 2
In →
rainbows
, a sun ray transmitted directly through a water →
droplet
.
See also:
→
ray
; →
class
.