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direction-indicator light
turn-signal light
signal light, one of a set, carried on a vehicle to indicate an intended, or actual, movement by the vehicle to the left or the right
Note 1 to entry: This entry was numbered 845-11-79 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-325 and 17-1356 in CIE S 017:2011.