Rainbow, e.g. (3)
I believe the answer is:
arc
(Other definitions for arc that I've seen before include "Luminous electrical discharge" , "Electric discharge" , "Bend" , "section of Circle Line" , "Something curved in shape" .)
I believe the answer is:
arc
(Other definitions for arc that I've seen before include "Luminous electrical discharge" , "Electric discharge" , "Bend" , "section of Circle Line" , "Something curved in shape" .)