heelpiece

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A piece made for or serving as the heel of a shoe or stocking.

Century Dictionary and Cyclopedia

1. n. That part of a shoe or stocking which incloses the heel of the foot either beneath or behind, or both; the heel.
2. n. Armor for the heel, especially that part of the solleret which covered the heel and the back of the ankle, and to which the spur was attached.
3. To furnish with a heel-piece; add an additional heel-piece to, as in repairing.
4. n. In iron ship-building, a short length of angle-bar which is used to connect the heels of the two sections of a frame which meet at the center-line of the vessel.

Wiktionary

1. n. A piece of armour to protect the heels.
2. n. A piece of leather fixed on the heel of a shoe.
3. n. figuratively The end.

GNU Webster's 1913

1. n. A piece of armor to protect the heels.
2. n. A piece of leather fixed on the heel of a shoe.
3. n. The end.