Tailpiece

n.
  1. A piece at the end; an appendage.
  2. (Arch.) One of the timbers which tail into a header, in floor framing. See Illust. of Header.
  3. (Print.) An ornament placed at the bottom of a short page to fill up the space, or at the end of a book.
  4. A piece of ebony or other material attached to the lower end of a violin or similar instrument, to which the strings are fastened.
  5. (Locks) A piece for transmitting motion from the hub of a lock to the latch bolt.
  6. The part of a telescope containing the adjusting device for the eyepiece, etc.