heelpost

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The post to which a door or gate is hinged.

from The Century Dictionary.

• noun The outer post in the stall-partition of a stable.
• noun Nautical, the post which supports, at the outer end, the propelling-screw of a steam-vessel.
• noun The hanging-post or hanging-stile of a door.
• noun The quoin-post of the gate of a lock.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Naut.) The post supporting the outer end of a propeller shaft.
• noun (Carp.) The post to which a gate or door is hinged.
• noun (Engineering) The quoin post of a lock gate.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun nautical The post supporting the outer end of a propeller shaft.
• noun carpentry The post to which a gate or door is hinged.
• noun The quoin post of a lock gate.