gyrostabilizer[jī′rō stā′bə līz′ər]
gyrostabilizer definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a device consisting of a gyroscope spinning in a vertical plane, used to stabilize the side-to-side rolling of a ship, spacecraft, etc.
gyrostabilizer definition by American Heritage Dictionary
An instrument having a heavy gyroscope whose axis spins in a vertical plane to reduce the side-to-side rolling of a ship or aircraft.