Meaning of bank indicator

bank' in"dicator

Pronunciation: [key]
— Aeron. Aeron.
  1. a flight instrument that measures the angle of roll about an aircraft's horizontal axis, thereby indicating whether or not the aircraft is skidding or slipping. Also calledCf. bank-and-turn indicator.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.