The vertical shaft of a rudder that allows it to pivot when the tiller or steering gear is operated.
The part of a vessel's rudder by which it is pivoted to the sternpost or rudderpost.
Webster's New World
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.