stabilizer

/S T EY1 B AH0 L AY0 Z ER0/
noun
  1. 1

    Any person or thing that brings stability.

  2. 2

    Any substance added to something in order to stabilize it.

  3. 3

    A gyroscopically controlled fin or similar device that prevents the excess rolling of a ship in rough seas.

  4. 4

    An airfoil that stabilizes the flight of an aircraft or missile.

  5. 5

    A piece of backing fabric used in embroidery.

Source: https://en.wiktionary.org/wiki/stabilizer