stabiliser

Noun

stabilizer (plural stabilizers)

1. (British, English, Oxford, US) Any substance added to something in order to stabilize it, as for example a fuel additive that prolongs the shelf life of petrol.
2. (British, English, Oxford, US) An additional wheel on a bicycle to keep it upright to assist a learner.

   Synonyms:

   training wheel

3. (British, English, Oxford, US) A gyroscopically controlled fin or similar device that prevents the excess rolling of a ship in rough seas.
4. (British, English, Oxford, US) An airfoil that stabilizes the flight of an aircraft or missile.
5. (British, English, Oxford, US) A piece of backing fabric used in embroidery.
6. (British, English, Oxford, US) For a group operating on a set and an element x of the set, the set of all group elements fixing x.