blinker

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blinker

a flashing light for sending messages, as a warning device, etc., such as a direction indicator on a road vehicle

blinker

blinker
An oxygen blinker. If its lips are open, it means oxygen is being supplied. If lips are closed, it means there is no oxygen supply.
blinker
Master blinker flashes whenever any warning light on the central warning panel illuminates indicating malfunction in some system.
A warning light or indicator that blinks to confirm that the system is functioning or malfunctioning.