turn indicator

American  

noun

Aeronautics.

1. a flight instrument that indicates the angular rate of turn of an aircraft about its vertical axis.

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Etymology

Origin of turn indicator

First recorded in 1915–20

Example Sentences

A pioneer of air instruments and of blind flying, Lawrence Sperry invented such indispensable aids to flight as the gyropilot, bank & turn indicator, early efficient parachute.

From Time Magazine Archive

When the driver flicks his turn indicator at night, the cornering light floods the area into which he is turning with a wide, low arc of light.

From Time Magazine Archive

He put on his turn indicator and pulled back out into the lane.

From "Counting by 7s" by Holly Goldberg Sloan

And if we were supposed to fly in anything but clear weather, we'd need a bank and turn indicator and an artificial horizon.

From Smugglers' Reef by Blaine, John

But in a heavy fog, or if he can’t see over his cockpit, the horizon doesn’t exist, and a bank and turn indicator is his instrument.

From Famous Flyers And Their Famous Flights by Grayson, J. J.