tailpiece

Short definition from Wiktionary

Noun

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