blink·er 
/ˈblɪŋkɚ/ noun
plural blink·ers /ˈblɪŋkɚ/ noun 1 [count] US, informal : a light on a car, truck, etc., that goes off and on and that is used as a warning or as a signal that the vehicle will be turning
▪ Use your blinker [=indicator, (US) turn signal] when you turn. 2 blinkers [plural] chiefly Brit : leather pieces that are placed on either side of a horse's head next to its eyes : blinders
▪ Use your blinker [=indicator, (US) turn signal] when you turn.
