plural of rudder

(nautical) An underwater vane used to steer a vessel. The rudder is controlled by means of a wheel, tiller or other apparatus (modern vessels can be controlled even with a joystick or an autopilot).

Having a rudder or rudders.

(aviation) The degree of control that the rudder can exert over the yawing motion of an aircraft; related to rudder design and airspeed.

(nautical) The main part or blade of the rudder, which is connected by hinges, or similarly, with the sternpost of a vessel.

plural of rudderstock