Trafficator
Part of speech: noun
Definition: A blinking light on a motor vehicle that indicates the direction that it is about to turn A semaphore device with a steady light that served the same purpose on early vehicles
Indicator
Part of speech: noun
Definition: a pointer or index that indicates somethinga meter or gaugethe needle or dial on such a meterany of many substances, such as litmus, used to indicate the concentration of a substance, or the degree of a reactiona plant or animal whose presence is indicative of some specific environmenta measure, such as unemployment rate, which can be used to predict economic trendsBritish for trafficator