A fin-like structure to the rear of the keel of a vessel that supports the rudder and protects a propeller.
A surfer; a person who leads a surfing lifestyle.
A look or glance.
A similar construction on a boat that acts as a keel.
A fin that serves to stabilize a surfboard.
A gyroscopically controlled fin or similar device that prevents the excess rolling of a ship in rough seas.
Any substance added to something in order to stabilize it.
A piece of backing fabric used in embroidery.
An additional wheel on a bicycle to keep it upright to assist a learner.
An airfoil that stabilizes the flight of an aircraft or missile.
For a group operating on a set and an element x of the set, the set of all group elements fixing x.