tailpiece

noun6

1. •
   An appendage or appendix.
2. •
   An element, often triangular, to which the strings of a violin, guitar, etc. are attached at the lower end of an instrument.
3. •
   The part of a telescope containing the adjusting device for the eyepiece, etc.
4. •
   An ornamental design at the end of a chapter or page.
5. •
   The part of a lock that transmits motion from the hub to the latch bolt.
6. •
   A short joist between a header and a wall.