Stabilizer (noun)

1. A device or substance used to make something stable and reduce its movement or oscillation.
2. A device used to maintain the stability of an aircraft in flight.
3. A substance added to a liquid to prevent separation of its components.

Origin:

Late 19th century: from stabilize, on the pattern of words such as stabilizer.

Examples:

1. The stabilizer kept the ship from rocking in rough waters.
2. The stabilizer in the plane's wing kept it level during flight.
3. The stabilizer was added to the paint to ensure an even consistency.
4. The stabilizer improved the handling of the vehicle.
5. The chef used a stabilizer to thicken the sauce.