heelpost

from The Collaborative International Dictionary of English v.0.48

Heelpost \Heel"post`\, n.
   1. (Naut.) The post supporting the outer end of a propeller
      shaft.
      [1913 Webster]

   2. (Carp.) The post to which a gate or door is hinged.
      [1913 Webster]

   3. (Engineering) The quoin post of a lock gate.
      [1913 Webster]