- (formerly) an illuminated arm on a motor vehicle that was raised to indicate a left or right turn
WordReference Random House Unabridged Dictionary of American English © 2020
traf•fi•ca•tor (traf′i kā′tər),USA pronunciation n. [Brit.]
- a directional signal on a vehicle for indicating which way it is going to turn.
- traffic + (indic)ator
Collins Concise English Dictionary © HarperCollins Publishers::
trafficator /ˈtræfɪˌkeɪtə/ n